What is a cell membrane and describe its structure and components.

Answers

Answer 1

Answer:

Cell membrane or plasma membrane is the semi-permeable outer layer surrounding the components of the cell.

It is important to the cell as it provides important properties to the cell as it separates the aqueous interior of the cell from the external environment, helps in cell–cell contact, in surface recognition, signaling and transport.

The plasma membrane is made up of different types of molecules like phospholipids, proteins, cholesterol, carbohydrates providing flexibility to the layer so, the model of membrane is known as fluid mosaic model.

The primary constituent of membrane is a lipid molecule called Phospholipids which is made up of glycerol molecules attached to a phosphate group and forms a hydrophilic head while long fatty acyl chains attached to the head froms hydrophobic tails.

It is the fatty acid chains which provide hydrophobic nature to the cell membrane. These layers are arranged in the form of bilayer with head towards outside while tails inside.

Along with phospholipid membrane posses peripheral and integral proteins which helps in transport of the molecules across membrane.


Related Questions

Which of the following would be an adequate stimulus for a mechanoreceptor?
a. oxygen
b. cell stretch
c. photon of light
d. cold temperature
e. Ph

Answers

Answer:

b. Cell stretch

Explanation:

Mechanoreceptors are the sensory receptors that sense the level or amount of stretch in the cells wherein they are present. Mechanoreceptors are one of the interceptors as they detect the changes in the internal bodily conditions (degree of cell stretch).

Example: mechanoreceptors present in walls of blood vessels and in the inner ear in the form of hair cells.

Final answer:

The most suitable stimulus for a mechanoreceptor is cell stretch (option b) because mechanoreceptors detect changes in physical disturbances like tension, pressure, or vibration.

Explanation:

Mechanoreceptors are sensory cells or organs that respond to mechanical stimuli such as pressure or distortion. In the context of your question, the most suitable stimulus for a mechanoreceptor is b. cell stretch. This is because mechanoreceptors can detect changes in physical forces such as tension, pressure, or vibration.

Mechanoreceptors are not typically activated by stimuli such as oxygen (a), photons of light (c), cold temperature (d), or pH levels (e), as these are better suited to chemoreceptors, photoreceptors, thermoreceptors, and pH receptors, respectively.

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Why are nerve impulses an important function in both the special senses and the musculoskeletal system?

Answers

Answer:

Nerve impulse provide signal to brain that controls the body position and position of muscles for movement in case of musculoskeletal system, and in special senses too information is gathered via senses and transmitted in the form of impulse to the brain.

Explanation:

Special senses include: vision, hearing, balance, taste and smell. Sensory receptors are present on these special senses which generates nerve impulse upon external or internal stimulus and this impulse travels to the central nervous system  via sensory nerve and is processed to produce further response.

Musculoskeletal system also have sensory receptors in joints and in muscles that produce nerve impulse, which travel to the brain and provide information about body positions and movements.

Learn the reactants and products for each stage of photosynthesis, and where in the plant cell does each stage occur.

Answers

Answer:

1: Light-dependent reactions:

Reactants: H2O, ADP, NADP

Products: O2, ATP, NADPH

Location: Thylakoid membranes of chloroplasts in cells of leaves

2: Light-independent reactions

Reactants: CO2, H2O, ATP, NADPH

Products: C6H12O6 (glucose), ADP, NADP

Location: Stroma of chloroplasts in leaf cells

Explanation:

Photosynthesis takes place in two stages:

1: Light-dependent reactions: This stage includes splitting of water in the presence of sunlight and release of electrons and oxygen gas. The electrons are channeled into the electron transport chain and result in the formation of ATP and NADPH. This stage includes photosystem I and II present in the thylakoid membrane. Hence, light-dependent reactions of photosynthesis occur in the thylakoid membrane of chloroplasts and form ATP and NADPH.  

2: Light-independent reactions: Also called as Calvin cycle, the light-independent reactions use ATP and NADPH formed during light reactions of photosynthesis to fix CO2 into glucose. The enzymes of the Calvin cycle are present in the stroma of chloroplasts and hence, this stage of photosynthesis occurs in the chloroplast stroma.  

In skeletal muscle, the area that is composed only of both thick and thin filaments is the
a. A-Band
b. I-Band
c. H-Zone
d. sarcomere
e. synapse

Answers

Answer:

A-Band

Explanation:

Sarcomere is the basic unit of skeletal muscle and shows various striations under the microscope.

Anisotropic band or A-Band is the portion of sarcomere that contains both the thick and thin filaments . A-Band appaers dark under the microscope. Thick filaments are consist of actin and thin filaments consists of myosin.

I-Band contains only thin filaments of myosin. H- zone contains only thick filaments and no thin filament. Sarcomere is the unit of a skeletal muscle. Synapse is the junction between two neurons.

Thus, the correct answer is option (A).

True or False. An ergometer is a device that accurately measures caloric expenditure.

Answers

Answer:

true..i think

Explanation:

The cellular organelle that is considered the site of respiration is the
a. Nucleus
b. lysosome
c. mitochondrion
d. rough ER
e. golgi apparatus

Answers

Answer:

c. mitochondrion

Explanation:

The mitochondrion is a double membrane-bound organelle present in eukaryotic cells only. It is the site for Kreb's cycle and oxidative phosphorylation and produces a large amount of energy stored in the form of ATP.  

Since Kreb's cycle and oxidative phosphorylation are second and final stages of aerobic cellular respiration respectively, the mitochondrion is called a site of respiration in cells.  

What is the dominant fiber type of bone tissue?
A) Reticular
B) Collagen
C) Elastic

Answers

Answer:

A) Reticular.

Final answer:

The dominant fiber type of bone tissue is collagen, providing strength and resistance to stretching.

Explanation:

The dominant fiber type of bone tissue is collagen. Collagen fibers are made from fibrous protein subunits linked together to form a long and straight fiber. These collagen fibers provide bone with its notable tensile strength, giving it the ability to resist stretching and contribute to the tissue's resilience. In bone tissue, the rigid, mineralized matrix that contains calcium salts and crystals is interwoven with collagen fibers, ensuring the bone's strength and stability.

The mother of an infant child asks the nurse what the right feeding schedule is for an infant. Of the following responses, which would be the best response for the nurse to make? Explain why.
a. Feed the infant every 2 hours.
b. Feed the infant every 3 hours
c. Feed the infant every 4 hours
d. Feed the infant when the infant is hungry.

Answers

Answer:

B

Explanation:

The child may go through growth spurts at 7-14 days old, between 3-6 weeks old, around 4 months old, and around 6 months old. So feeding them at that consistency will help in their development.

The first level in the PLISSIT model involves _______

a.
giving limited information

b.
making specific suggestions

c.
undergoing intensive therapy

d.
giving permission

Answers

Answer:

Option D, giving permission

Explanation:

PLISSIT model deals with sexual issues of a patient in a professional manner.  

There are four levels in a PLISSIT model -

a) The first level is giving permission  

b) Second Level - Some/limited knowledge

c) Third level - Specific suggestion to requiring advance level of knowledge about a topic

d) Fourth Level - Requirement of special treatment or therapy.  

Hence, option D is correct.

Where is gastrin produced, and what stimulates its production?

Answers

Answer:

Gastrin is a hormone of peptide origin that is secreted by the G cells in the pyloric antrum of the stomach, the duodenum and the pancreas, as a response to certain stimulus, like meals.

Its main function, is to activate the parietal cells of the stomach in order for them to start producing stomach acids, particularly HCI (hydrochloric acid), in order for digestion of proteins, and other such molecules, to be carried out. Another function of gastrin, aside from accelerating the production of gastric acid, is to stimulate stomach motility to ensure better mixing of the stomach acids with the contents in it for better digestion.

The reasons for why the production of gastrin is stimulated are: when the antrum of the stomach is distended, the presence of partially digested proteins, particularly amino acids, and finally, certain illnesses like hypercalcemia.

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

Answers

Answer:

The formed elements of the blood include red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). Of these, leukocytes are primarily involved in the immune response. All formed elements originate in the bone marrow as stem cells (HSCs) that differentiate through hematopoiesis.

Explanation:

The formed elements of the blood include red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). Of these, leukocytes are primarily involved in the immune response. All formed elements originate in the bone marrow as stem cells (HSCs) that differentiate through hematopoiesis.

Final answer:

Blood contains formed elements such as red blood cells, which transport oxygen and carbon dioxide; white blood cells, which defend against infections; and platelets, which are involved in blood clotting and tissue repair.

Explanation:

The Formed Elements of Blood and Their Functions

The formed elements of blood include red blood cells (RBCs or erythrocytes), white blood cells (WBCs or leukocytes), and platelets (thrombocytes). These elements play critical roles in the body's functions and are suspended in the plasma, the extracellular matrix of the blood.

Functions of Red Blood Cells

Red blood cells are biconcave cells that carry hemoglobin, a molecule essential for transporting oxygen from the lungs to the tissues and carbon dioxide from the tissues back to the lungs. They lack a nucleus and mitochondria, which allows for more space to carry hemoglobin. Erythrocytes have a lifespan of about 120 days and are produced in the bone marrow.

Functions of White Blood Cells

White blood cells are key to the body's immune response. They fight infections and foreign bodies through processes like diapedesis, where they pass out of blood vessels into tissues. Leukocytes include granular types such as neutrophils, eosinophils, and basophils, and agranular types such as monocytes, NK cells, B cells, and T cells.

Functions of Platelets

Platelets are small cell fragments that originate from megakaryocytes in the bone marrow. They play a significant role in hemostasis, the process of blood clotting, by forming a temporary plug at a site of injury to the blood vessels. Platelets also release growth factors to repair and heal tissues.

Together, these elements ensure proper oxygenation of tissues, defense against pathogens, and prevention of excessive bleeding.

Where is simple squamous eplithelium found in the body? A) Oral cavity, pharynx, vagina, anus B) Air sacs of the lungs C) Tendons and ligaments D) Spleen and lymph nodes E) In the heart

Answers

Answer: B) Air sacs of the lungs

Explanation:

A simple squamous epithelia is a single layer of cells which have a basal lamina. The simple squamous epithelia are the tissues that are found in the air sacs present in the lungs. These are found in the blood vessels such as capillaries, glomeruli and alveoli. These tissues are necessary for supporting the rapid diffusion of air inside the blood vessels.

A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 million years. How many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of eight mutations?

1.5 million years
10 million years
40 million years
20 million years
Branliest answer and 5.0 rate please just help me

Answers

Answer:

20 million years

Explanation:

If we have a neutral mutation rate of one mutation per 5 million years, then the total of eight mutation between the two different species would be 20 million years. This is because both species will have 4 mutations in those 20 million years, so combined, both by 4, will have 8 mutations between them. So few mutations on so much time will result in two species that are very similar to each other even after 20 million years of evolution, even making them hardly distinguishable, especially if it comes to defining fossil records from them both. A nice example of this are the members of the felidae (cat) family, which are all very closely related, and are almost identical, thus making it extremely hard to distinguish two species of the same or similar size by their fossils.

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. Remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes

Answers

Answer:

Explanation:

a damming a river                increases the supply. Supply side solution. There's more water there.

b desalinating seawater      definitely increasing the supply. You create drinking water from what was not there before.

c invading nation for rivers  increasing the supply (not by much. The people who are there still need their water).

d Raising water prices          reducing the demand

e Tax breaks                          reducing (and maintaining) the demand

f  drip irrigation                      reducing the demand.  

Answer:

Supply-side solutions: desalinating seawater , damming a river to create a reservoir , a nation invading a neighboring country to access their rivers Demand-side solutions: raising water prices for consumers and businesses , providing tax breaks for companies that use less water , requiring low-flow shower heads in al new homes , replacing inefficient irrigation with more-efficient drip irrigation to grow crops

Explanation:

As stated in the above question, supply side solutions increase the supply of fresh water. This means that the options that will increase the level of fresh water that will be offered to the consumer will be on the supply side, that is, those options that will provide plenty of choice for the consumer should be on the supply side, so we can say that the solutions are: desalinating seawater, damming a river to create a reservoir, a nation invading a neighboring country to access their rivers

The above question also states that demand-side solutions will reduce demand for fresh water. This means that these solutions should discourage consumers from paying for or limiting their use of fresh water. These solutions are: raising water prices for consumers and businesses, providing tax breaks for companies that use less water, requiring low-flow shower heads in new homes, replacing inefficient irrigation with more-efficient drip irrigation to grow crops

When considering an RBC histogram, what can cause an elevation in the left side of the curve?

Answers

Answer:

Low mean corpuscular value can shift the curve to the left side.

Explanation:

RBC histogram may be defined as the process of plotting the number of blood cells on Y- axis and their relative size on X- axis. Modern automated haematology is used for the construction of RBC histogram.

The cell population of RBCs is similar in size but not equal to the size of RBC the curve can shift to either direction. The low MCV (mean corpuscular value) value can shift the the curve to the left side while considering an RBC histogram.

Final answer:

An elevation in the left side of an RBC histogram can be caused by polycythemia. This condition may result from dehydration, chronic adaptation to high altitudes, or polycythemia vera, a bone marrow disease that increases the production of immature erythrocytes, affecting blood viscosity and pressure.

Explanation:

An elevation in the left side of an RBC histogram can be caused by several conditions that affect red blood cell populations in the bloodstream. One such cause is polycythemia, an elevated RBC count that is detectable through an elevated hematocrit. Conditions leading to polycythemia include dehydration where plasma volume falls, adaptation to high altitudes where increased RBC production is a normal response to lower oxygen levels, and polycythemia vera, a bone marrow disease causing overproduction of immature erythrocytes.

In the context of polycythemia vera, this rare disease more commonly affects males and the elderly, leading to increased blood viscosity which can elevate blood pressure and make it harder for the heart to pump blood. Other factors such as diseases that lead to excessive destruction of RBCs or their abnormal shapes, such as in sickle cell anemia, can also affect the shape of the RBC histogram.

The first blood vessels that branch from the ascending aorta are the
A. coronary arteries.
B. brachiocephalic arteries.
C. common carotid arteries.
D. subclavian arteries
E. pulmonary arteries.

Answers

Answer:

A

Explanation:

The only branches of the ascending aorta are the two coronary arteries which supply the heart.

The first blood vessels that branch from the ascending aorta are the brachiocephalic arteries. Thus, the correct option is B.

What are Blood vessels?

Blood vessels may be defined as the networks of hollow tubes like pipes, which carry blood to and from all different parts of the body.

The first branch of the ascending aorta consists of the brachiocephalic arteries. It is the largest branch that ascends laterally to split from the ascending aorta.

Therefore, the correct option for this question is B.

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A chemical that minimizes changes in the pH of a body fluid by releasing or bindig hydrogen ion is called a ______.
A) alkali
B) electrolyte
C) compensation
D) acid
E) buffer

Answers

Answer:

Buffer

Explanation:

Buffers may be defined as the solution of a weak acid with ithe conjugate base or a weak base with the conjugate acid. Buffers are not affected by the the additions of strong acid or base in a solution.

Whenever a strong base or acid is added to the buffer, it  may release or binds with the hydrogen ion and maintains the pH of a body fluid.  Blood has a buffer of carbonate ions and bicarbonic acids that maintains the blood pH.

Thus, the correct answer is option (E).

Final answer:

A chemical that stabilizes pH by binding or releasing hydrogen ions is called a buffer. These substances, such as the bicarbonate system in the human body, help maintain pH at a level essential for effective physiological function.

Explanation:

A chemical that minimizes changes in the pH of a body fluid by releasing or binding hydrogen ions is known as a buffer. Buffers play a crucial role in maintaining the acid-base balance within the pH range crucial for proper physiological functioning, which for blood is roughly between pH 7.35 and 7.45. These systems can absorb excess hydrogen ions (H+) or hydroxide ions (OH−), preventing significant changes in pH. For example, the bicarbonate system in the human body is an important buffer that helps maintain a stable pH level by reacting with hydrogen ions to form carbonic acid or with hydroxide ions to form bicarbonate ions.

There are various buffering systems that include not only bicarbonates but also phosphates, plasma proteins, and hemoglobin. These substances often consist of a weak acid and its conjugate base, which can neutralize small amounts of acids or bases in body fluids. Therefore, the correct answer to the question is E) buffer.

Translation requires

RNA only.

DNA, RNA, amino acids, and ribosomes.

DNA and RNA.

DNA, RNA, and ribosomes.

RNA, amino acids, and ribosomes.

Answers

Answer: RNA only.

Explanation:

Translation is a process of decoding of the molecules of messenger RNA and using it for the synthesis of the polypeptide, or a chain of an amino acids. The polypeptide chains coalesce to from the protein. The proteins are building blocks of lives. They are necessary for performing specialized functions in the body of the living being.

Final answer:

Translation involves DNA, RNA, amino acids, and ribosomes. The encoded information from DNA is copied into RNA, which is then used by ribosomes to assemble amino acids into a protein.

Explanation:

Translation, in terms of genetics, primarily requires DNA, RNA, amino acids, and ribosomes. During translation, the genetic information stored in mRNA, which has been transcribed from DNA, is decoded by the ribosomes to form a sequence of amino acids, creating a protein. DNA serves as the original blueprint, RNA transfers the coded information, amino acids are the building blocks of the protein, and the ribosomes act as the sites where the protein synthesis occurs.

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What is the name of the contractile unit of a muscle fiber?

Answers

Answer: I believe it’s called myosin fibers

Explanation:

An injection of gamma globulin containing antibodies or antitoxin would be an example of ________ immunity.
a. Artificially acquired passive
b. Naturally acquired active
c. Artificially acquired active
d. Naturally acquired passive

Answers

Answer:

Option (A).

Explanation:

Artificial passive immunity can be acquired by injecting readymade antibodies. The antibodies are not produced by the recipient cells of the organism.

The injection of gamma globulin is artificially acquired passive immunity as these antibodies are injected directly into the body of the recipient. This immunity is  given to provide short term immunization to an individual organism.

Thus, the correct answer is option A.

Which unicellular gland is typically found in mucosal epithelium? A) Neuroepithelia cell B) Myoepithelia cell C) Goblet cell D) Merkel cell

Answers

Answer:

D

Explanation:

What happens when Peristalsis occurs in the digestive tract

Answers

In the digestive tract, peristalsis makes the solid and liquid components to move along within the tube-like compositions of the digestive tracts.

What is peristalsis?

It is the contraction of muscles in the digestive and urinary tracts. It is a specific, wave-like kind of the contraction of muscle as its objective is to move the liquids or solids along within the tube-like compositions of the digestive and urinary tracts.

It is an involuntary muscle movement, which cannot be controlled. The smooth muscles, which takes part in peristalsis function when they are instigated to do so. In the digestive tract, peristalsis begins in the esophagus. Post swallowing of the food, it is moved down the esophagus via peristalsis. Further the process is continued by the muscles in the stomach, large intestine, and small intestine.

Thus, peristalsis makes the movement of foods through the muscles of the digestive tract and the food is digested and broken down as it moves down.

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Which type of dwarfism affects only the long bones? They have a normal size, head and torso.

Answers

Answer:

Achondroplasia affects the long bones and individual has normal size, head and torso.

Explanation:

Achondroplasia dwarfism may be defined as the form of dwarfism in which the conversion of bone to cartilage is defected. This is the most common form of dwarfism.

Achondroplasia dwarfism mainly affects the long bones of an individual as there is problem in the conversion of cartilage to bone. The individuals have short arms and legs but they have normal head and torso size. The individuals has height around 4 feet.

Proteoglycans are a group of macromolecules formed from: a. proteins and glycosaminoglycans. b. proteases and glycosaminoglycans. c. proteins and glycogen. d. proteases and monosaccharides. e. proteins and polysaccharides.

Answers

Answer:

Proteins and polysaccharides.

Explanation:

Proteoglycans are heavily glycosylated proteins. These proteoglycans are present in the extracellular matrix of the animal cells and acts as a lubricant for the cells.

Proteoglycans are proteins that are covalently bonded with muco polysaccharidse. Proteoglycans are formed by the bonding between proteins and carbohydrates ( polysaccharides). Proteoglycans can combine with collagen to form cartilage and may affect the stability of a protein.

Thus, the correct answer is option (E).

Answer:

a

Explanation:

Soft-shell crab is a prized dish in many ocean-side resorts. Why are the crabs' shells soft? The crab has just molted and the new exoskeleton has not yet hardened. These species have evolved a light and soft exoskeleton so that they can float in the water column. These species have evolved a light and soft exoskeleton so that gases can diffuse directly between body of the crab and the surrounding water. These species of crabs live under rocks and therefore have lost the hard exoskeleton over evolutionary time.

Answers

Soft-shell crabs have soft shells because they have recently molted and their new exoskeleton has not had time to harden. The exoskeleton is made of chitin and is crucial for protection and movement but must be shed periodically as the crab grows.

The soft shells of soft-shell crabs are due to the fact that they have recently molted. Crabs, including soft-shell crabs, have an exoskeleton which is an external, hard shell that provides defense against predators, supports the body, and facilitates movement. The exoskeleton, made primarily of a substance called chitin, does not grow as the crab grows.

Therefore, crabs must periodically shed their old shell in a process known as molting, during which the new exoskeleton underneath is initially soft until it hardens. This molting process is necessary because the exoskeleton is acellular and cannot expand. Soft-shell crabs are caught for consumption shortly after they molt, before their new exoskeleton has had time to harden.

Which of the following hormones is currently thought to decrease plasma calcium levels in pregnant women and children?
A. thyroid hormones
B. calcitonin
C. parathyroid hormone (PTH)
D. calcitriol

Answers

Answer:

Calcitonin

Explanation:

Calcitonin hormone is released by the para follicular cells of the thyroid gland.   This hormone works against the parathyroid hormone.

Calcitonin hormone regulates the level of calcium by decreasing the blood calcium level. This hormone inhibits the osteoclast activity of the cells and decreases the absorption of calcium in pregnant women and child. Hence, calacitonin decreases plasma calcium levels in pregnant women and children.

Thus, the correct answer is option (B).  

Describe the role of environment in obesity.

Answers

Answer: Due to the hot as well as sticky wide spread climate many peop;e don´t want to go outside to exercise due to the fact of not wanting to get hot and sweaty. Therefore people stay inside of their house eating for entertainment never burning off the fats or sugars that their bodies absorbed during them eating out of bordem.

Select the correct statement about lymphocytes. A) B cells produce plasma cells, which secrete antibodies into the blood. B) The two main types are T cells and macrophages. C) T cells are the precursors of B cells. D) T cells are the only form of lymphocyte found in lymphoid tissue.

Answers

Answer:

A) B cells produce plasma cells, which secrete antibodies into the blood

Explanation:

There are two types of lymphocytes present in blood. These are namely, B lymphocytes and T lymphocytes. The B lymphocytes are activated with help of T lymphocytes. The activated B cells divide and produce a large number of cells that differentiate into the plasma cells. These plasma cells finally produce antibodies against specific antigens.

Final answer:

The correct statement about lymphocytes is that B cells produce plasma cells, which in turn secrete antibodies into the blood. This is a vital part of the immune system's response to pathogens and infections.

Explanation:

In the context of the human immune system and lymphocytes, the correct statement is 'B cells produce plasma cells, which secrete antibodies into the blood.' This statement accurately describes an important function of B cells as a type of lymphocyte. B cells, upon activation, differentiate into plasma cells that produce and secrete antibodies, which help in fighting off pathogens and infections in the body. This process is a vital part of the immune system's response to foreign substances.

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What is the Glasgow Coma Scale for the following patient; opens eyes in response to pain, confused conversation, and withdraws to pain.
a)5
b)6
c)8
d)10

Answers

Answer: the correct answer is d) 10

Explanation: The Glasgow coma scale is used to assess patients in a coma. The initial score correlates with the severity of brain injury and prognosis. The Glasgow Coma Scale provides a score in the range 3-15; patients with scores of 3-8 are usually said to be in a coma.



Select all the correct answers.
Which statements fail to meet the requirements of a scientific claim?

A). In the final 100 meters of a 10,000-meter race, an athlete's speed is more strongly related to anaerobic efficiency than to aerobic efficiency.

B). Flowers that reflect the most ultraviolet light are more likely to attract bees and other pollinators than flowers that reflect less ultraviolet light.

C). The evidence supporting Newton's laws of motion was accurate in Newton's time, but the universe operates differently today.

D). Even though evidence indicates that the solar system's planets follow elliptical paths, Copernicus's model involving circular orbits is true.


Answers

Answer:

A And D

Explanation:

Option A and D are correct answers are fail to meet the requirements of a scientific claim

What is Scientific claim ?

scientific claim is defined as a conclusion of experimental outcomes and it will be supported with proofs of experiment.

It should be  falsifiable and empirically testable.

It needs the prior scientific knowledge of the particular topic before doing experiment, then a systematic investigation will be done followed by testing claim.

After testing claim, it should be creditable as this can be used in our   day to day life.

The accuracy of the result should be maintained, so that  the future researches in the same field can apply in their  research.

If the scientific claims will be incorrect, then it can cause many future disturbances.

Hence option A and D are correct.

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What similarities and differences do you recognize? i have five quick modern world studies questions. i will mark you as brainliest.1. what was a cause of the cold war?a. construction of the berlin wallb. formation of NATOc. establishment of the warsaw pactd. soviet fears of western world domination2. what was NOT part of the marshall plan?a. the united states wanted to prevent the spread of communism.b. the united states sponsored a humanitarian effort to rebuild europe.c. american aid was used to rebuild cities and factories.d. the united states established air bases in china.3. which group contains reasonable elements of a policy of containment?GROUP A- economic aid to allies destroyed by war- threats of military retaliation against the enemy- economic aid to enemies destroyed by war- offers of military aid to nations that might become allies- health and education programs in unaligned nationsGROUP B- military intervention in countries aligned with the enemy - boycotts and embargoes against unaligned nations- refusal to negotiate with the enemy- medical aid to poor nations - education programs within ones own country4. which american president committed the united states to a policy of preventing the spread of communism?a. john f. kennedyb. harry trumanc. dwight eisenhowerd. ronald reagan5. which cold war leader would be most likely to agree with the statement shown below?we must recognize that stalin committed a grave mistake by executing hundreds of thousands of people for anti-soviet activities, but now we must move on to create a glorious soviet union. we must focus on strengthening communism and developing our own resources. there is no need to waste our energy waging war on capitalist countries. we can peacefully coexist with the capitalists until they crumble under the weight of their own corruption.a. mao zedongb. chiang kai-shekc. fidel castrod. nikita khrushchev What is a monosynaptic reflex arc? 14. Which one of the following formulas correctly expresses this statement: The number x is equal to another number n plus the square root of 3. A. x = n + 3 B. x = 3n2 C. x = n + 3 D. x = n + 32 Whats the point of life Consider a sample of 10.0 g of the gaseous hydrocarbon C2H6 to answer the following question: How many moles are present in this sample?When answering the question, include the following:State how to find the molar mass for the hydrocarbon.State how you know if you need to multiply or divide by the molar mass.Give the correct number of significant figures and explain why the answer has that many significant figures. Reiko is going to use AAS to prove that VWX=YZX. PLZ HELP ASAP Determine whether the random variable is discrete or continuous. In each case, state the possible values of the random variable. (a) The number of fish caught during a fishing tournament . (b) The time it takes for a light bulb to burn out . Which one has larger kinetic energy: a 500-kg object moving at 40 m/s or a 1000-kg object moving at 20 m/s? a. The 500-kg object b. The 1000-kg object c. Both have the same kinetic energy. I do not understand how to find Q Explain what x^(2/3) means using radicals and integer exponents. please help A manager measured the number of goods,y, that his company produced inxhours. The company produces goods at a rate of5per hour. At hour9,the company had produced45goods.Which equation, in point-slope form, correctly represents the goods produced by the company afterxhours?A.y45=5(x+9)B.y45=5(x9)C.y+9=5(x+45)D.y9=5(x45) I have wasted 100 points for someone to answer this PLEASE HELP PLEASE HELP SUPER STRESSED!!!What should my conclusion sentence be?For my project, "Analyze a Formal Essay", I chose to read an article, "Polluted waterways help fuel drug resistance in bacteria" by Carolyn Wilke. There are three reasons why this article is considered a formal essay. First, it focuses on one topic presented in the thesis statement and does not stray from the topic at any point. Second, the article strictly uses third-person pronouns, it does not at any point use first or second person pronouns. Third of all, the author does not present any emotion or personal opinion. The essay presents facts and ideas with critical evaluation, arguing a point and analyzing it in detail. It is clear at the beginning of the article that the author's goal is to explain and inform. The article starts of with its thesis statement stating In a massive survey of rivers across 72 countries, researchers found antibiotics at 66 percent of 711 sites sampled. Many of the most drug-polluted waterways were in Asia and Africa, where there hadnt been much data until now. It then continues to explain further the effects this has on the public and what this could mean in the future. Help need on 2 algebra problems !!!!!!! pleaseEvaluate the root without using a calculator, or note that the root isn't a real number. 1. square root 8256 A. Not a real number B. 16 C. 2 D. 42.square root 416 A. 2 B. 2 C. 3 D. Not a real number What is the factorization of the trinomial below?4x^2+28x + 48O A. 4(x+3)(x+4)O B. 4(x+2)(x+4)O C. (x+2)(x+16)O D. (x+3)(x + 4) Why do we know more about the Aztec than the Maya?OA. The Aztec destroyed Maya records.OB. The Maya civilization fell much sooner than Aztec civilization,OC. Most Maya immigrated to North America.OD. The Maya had no written language. What are the zeros of the function shown in the graph? WILL MARK BRAINLIEST what is the equation in poiny slope form of the line that is perpendicular to the given line and passes through the point (-4, -3)