Answer:
preparedness.
Preparedness is the tendency to learn some associations more easily, quickly and permanently than others.
Answer: PREPAREDNESS
Humans are much more likely to associate snakes with danger than flowers and danger. According to the evolutionary perspective, this tendency is called PREPAREDNESS.
Explanation: Preparedness is that tendency that people fear things that are harmful quickly and effortlessly more than things that are not harmful example; people are more likely to fear a scorpion than a tree.In essence, people learn some association more quickly,easily and permanently than others.
Part A How do the potential energy and the kinetic energy change when the skateboarder is at the top or the bottom of the hill? Why do you think this change occurs?
Answer:
The potential energy (P.E) and the kinetic energy (K.E) are two types of distinct energy that is commonly observed in our day-today's life.
Usually, K.E is defined as a type of energy that is produced when an object is in motion. Where, as P.E is a type of energy that is stored in an object when that object is placed at a certain height.
In the given condition, when the skateboarder is at the top of the hill, then at that position, it is comprised of maximum P.E. As the he slowly comes down the hill, then the P.E gradually decreases, and the K.E gradually increases. This shows the P.E is slowly changing into the K.E. And as it comes down, the K.E increases, and eventually when he stops, then both the K.E and P.E becomes zero.
This changes occurs because energy can never be created nor destroyed, and it changes from one form to another.
Answer:
The potential energy and kinetic energy are always in flux. At the top of the hill, potential energy is at its highest and kinetic energy is at its lowest because the skateboarder stops for just a moment before being pulled down the hill by the force of gravity. At the bottom of the hill, kinetic energy is the highest because the skateboarder reaches maximum speed.
Explanation:
PLATO
If you put $7850 in the atm each day, what percent of the days in a month should you expect to run out of cash
Answer:
23.33%
Explanation:
Money put in ATM per day=$7850
We have to find the percent of days in a month you should expect to run out of cash.
Form given data
There are 7 days in which you run out cash more than $7850
Total number of days in a month=30
Percent formula:[tex]\frac{corresponding \;days}{Total\;number\;of\;days}\times 100[/tex]
Using the formula
Percent of the days in a month you should expect to run out of cash=[tex]\frac{7}{30}\times 100[/tex]=23.33%
Almost half the birds in the yard were brown cardinals and the rest were bright red cardinals, so Jimmy perceived them as two distinct groups of birds. This best illustrates the principle of:__________.1. Connectedness2. Similarity3. Closure4. Relative clarity
Answer:
The answer is Similarity
Explanation:
The distinct features of the two groups of birds i.e brown cardinals and bright red cardinals illustrates the principle of similarity. The principle of similarity states that things that share visual features such as shape, size, color, texture, value or orientation will be seen as belonging together or being in a unified group
Final answer:
Jimmy's categorization of birds into brown and bright red cardinals based on color best illustrates the principle of similarity, a key concept in Gestalt psychology where items that share common features are perceived as part of a group.
Explanation:
The scenario where Jimmy perceived almost half the birds in the yard as brown cardinals and the rest as bright red cardinals, categorizing them into two distinct groups based on color, best illustrates the principle of similarity. The principle of similarity is a concept within the theory of Gestalt psychology which suggests that elements that are alike tend to be perceived as a group. This is because our minds tend to organize sensory input into groups or categories that share common attributes. For instance, in sports, fans easily differentiate teams based on the color of their uniforms, grouping players accordingly. This shows how the principle of similarity operates in everyday observations and categorizations, much like Jimmy's classification of cardinals by their color.
The pedigree chart below shows the inheritance of a genetic disorder in three generations of one species of insect. Shaded shapes represent individuals that have the disorder.
Which mates are least likely to produce offspring that have the disorder?
A) male 1 and female 2
B.) male 3 and female 4
C.) male 5 and female 6
D.) male 9 and female 10
It will help so much if you could answer! I love you!!
Answer: C.) male 5 and female 6
Explanation: A pedigree chart represents the inheritance of a specific trait or traits along generations. In the representation, squares are male and circles are female.
The question asks for least likely to have offspring with the disorder. Analysing the chart, it is observed that male 1 and female 2 have offsprings with shaded shapes: individuals 3, 7 and 10, so their probability of having children with the disorder is not small. It's 3 in 5.
Male 3 and female 4 also have an offspring with a genetic disease, so ti's not this couple.
Male 9 and female 10 have 2 offspring with the disorder. So their probability is not so low.
Male 5 and female 6 are the only couple without an offspring with the trait. So, their chance of having an offspring having the disorder is the least.
In conclusion, couple 5 and 6 have the least probability of having an offspring with the genetic disorder.
Answer:
C. Male 5 & female 6
Explanation:
Edge. 2022 ^
High blood sugar Select one: a. Is termed hypoglycemia and stimulates alpha islet cells to produce glucagon b. Causes beta islet cells to produce glucagon c. Results in the the hypothalamus releasing insulin into the blood d. Stimulates the release of insulin by beta islet cells
Answer:Stimulates the release of insulin by beta islet cells
Explanation:High blood sugar level is called hyperglycemia.
It is very important for the body to regulate it's blood sugar level. This is done by hormones; insulin and glucagon.
When blood sugar rises, the beta cells of the pancreas produces insulin. This insulin reduces the blood sugar level by storing up glucose in the body.
High blood sugar level leads to diabetes.this condition occurs when the pancreas does not produce Insulin or produces insufficient insulin or the body becomes resistance to the activity of insulin.
Patients with diabetes have to take shots of insulin in order to keep their blood sugar level within the normal range.
When the blood sugar level is low, glucagon is produced by the alpha cells in the pancrease.glucagon converts stored glucose back into forms the body can use .
The correct option is (d). High blood sugar stimulates the release of insulin by beta islet cells.
When blood sugar levels rise, the beta cells in the pancreas are stimulated to release insulin. Insulin is a hormone that helps cells throughout the body absorb glucose and use it for energy. This process lowers blood sugar levels, counteracting the state of hyperglycemia (high blood sugar).
Option a is incorrect because hypoglycemia refers to low blood sugar, not high blood sugar. Hypoglycemia stimulates alpha islet cells to produce glucagon, which raises blood sugar levels.
Option b is incorrect because high blood sugar does not cause beta islet cells to produce glucagon; rather, it stimulates the production of insulin.
Option c is incorrect because the hypothalamus does not release insulin; insulin is released by the beta cells of the pancreas. The hypothalamus is involved in regulating many body functions, including hunger and thirst, but insulin release is not one of them.
The pain of a migraine is caused by: A. vision loss B. Blood vessels narrowing, resulting in less blood flow to the brain C. Blood vessels expanding, which allows more blood flow to the brain D. Muscle Tension in shoulders and neck
Explanation:
Loss of vision can happen out of nowhere or grow step by step after some time. Vision misfortune might be finished (including the two eyes) or incomplete, including just one eye or even certain pieces of the visual field. Vision misfortune is unique in relation to a visual impairment that was available during childbirth, and this article is worried about reasons for vision misfortune in a person who recently had a typical visionHence, the right answer is option A "vision loss"
Identify the lysogenic virus:
A. Measles
B. Chicken pox
C. Small pox
D. Flu
Answer:
Flu
Explanation:
Flat bones consist of spongy bone sandwiched between compact bone. Is this statement true or false?
Explanation:
Each osteon is made out of concentric rings of a calcified network called lamellae (solitary = lamella)the lacunae and osteocytes are found in a grid-like system of network spikes called trabeculae (particular = trabecula) (Figure (Links to an outer site.)). The trabeculae may give off an impression of being an irregular system, however every trabecula shapes along lines of worry to give solidarity deep down.This system of flat bones consist of spongy bone permits supplements to be moved to the osteocytes and squanders to be expelled from themHence, the right answer is "flat bones consist of spongy bone sandwiched between compact bone is true statement"The statement is true. Flat bones do consist of spongy bone sandwiched between compact bone, offering protection and a surface for muscle attachment.
Explanation:The statement that flat bones consist of spongy bones sandwiched between compact bones is indeed true. These flat bones such as the ribs, the sternum, and parts of the skull, are relatively thin, flattened, and usually curved.
They have two parallel layers of compact bones sandwiching a layer of spongy bone between them, offering protection to body organs and providing a surface for muscle attachment. The spongy bone also houses bone marrow, where blood cells are produced.
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Please help, which is a characteristic of living organisms? (Select all that apply.)
Answer:
living organisms make more living organisms.
living organisms adapt and evolve.
living organisms move and breath.
Which kingdom of living things consists entirely of multi-celled
Complete Question:
Which Kingdom of living things consists entirely of multi-celled, heterotrophic organisms?
A) Animal
B) Fungi
C) Plant
D) Protist
Correct Option:
Animal Kingdom of living things consists entirely of multi-celled, heterotrophic organisms.
Option: A
Explanation:
The system of scientific classification in biological science is categorized into seven main groups: kingdom > phylum > class > order > family > genus > species. Here the kingdom is the largest group while smallest is the species. The term phylum is being used in the Kingdom of Animals, and is the second largest group.
The Kingdom of Animals is made up of multi-cellular, heterotrophic species which feed on other entities to survive. Some of the animal properties in this kingdom are able to establish, function independently, and reproduce during their existence.
Theo is a gardener tending to his plants. He makes sure to apply an organic insecticide to all of his plants except his coffee plants. Why does Theo skip his coffee plants
Answer:
Coffee contains a natural insecticide known as xanthines.
Explanation:
Coffee contains xanthines, a purine base chemical that functions as a drug precursor in some medications and as an ingredient in the manufacture of pesticide.
Xanthines can be also be found naturally in other substances such as theobromine and theophylline.
Hence, Theo must have skipped his coffee during the application of organic insecticide to his plants due to the fact that coffee contains a substance that can naturally act as an insecticide.
A cornish game hen is really the young of what sort of bird
Answer:
Broiler Chicken
Explanation:
They are produced from a cross between the Cornish and White Plymouth Rock chicken breeds
A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb. To travel from the artery to the thumb and then back to the left ventricle, this red blood cell must pass through _____. A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb. To travel from the artery to the thumb and then back to the left ventricle, this red blood cell must pass through _____. two capillary beds four capillary beds one capillary bed three capillary beds
Answer:
A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb. To travel from the artery to the thumb and then back to the left ventricle, this red blood cell must pass through two capillary beds.
Explanation:
Capillary beds are the netwrok of capillaries present in all tissues of body. They are the sites of diffusion and exchange of material within the body (oxygen, CO2 , glucose etc)
As the humad red blood cell travels from the artery of left arm to thumb, it passes through one capillary -bed as it has to supply oxygen to a cell in thumb and as it moves through the artery back to the left ventricle, it again pass through another capillray-bed.
Hence the Red blood cell will pass through two capillary beds.
When individuals of the same species are reproductively isolated, genetic differences may accumulate in sufficient number so that new species could emerge. What would such an event be an example of:__________
Answer:
macroevolution
Explanation:
Macroevolution occurs due to the genetic differences accumulates in the population of the same species which gets reproductively isolated from the older population and got different environments and resources to live.
Macroevolution leads to the creation of a new species over a long period of time because of the genetic difference that occurs due to mutation in the gene in the population who got reproductively isolated. So the new species evolved from the macroevolution.
How do limiting factors affect the carrying capacity of an environment
Answer:
They prevent a population from exceeding a certain number.
The following are assessment finding for a client with pre-eclampsia: blood pressure 158/100; urinary output 50 mL/hour; lungs clear to auscultation; urine protein 11 on dipstick; edema of the hands, and feet. On the next hourly assessment, which new assessment finding would be an indication of worsening of the pre-eclampsia
1)Blood pressure 158/104
2)urinary output 20ml per hour
3)Reflexes 21
4)Platelet count 150,000
Answer: The correct answer is (2) urinary output 20ml per hour
Explanation:
Preeclampsia is a condition in pregnant women, or could develop after delievry, where her blood pressure rises significantly, >140/90 mmHg(recorded on two occasions,atleast 4 hours apart).Moreover urine test indicates protein in her urine(proteinuria), swelling particularly of hands,legs and feet(edema),severe headaches along with many other symtoms.
On the next hourly assessment,
• The client's BP was recorded as 158/104, which is almost the same as it was initially recorded,i.e 158/100, which means her BP did not rise significantly.
•The client's reflexes are normal
•The client's platelet count is normal too, although it is on a lower side(normal range is between 150,000-450,000)
•Decrease in urinary output(20ml/hr) is an indication of worsening of preeclampsia because this indicates there is decreased renal perfusion which may subsequently lead to decreased GFR(glomerular filtration rate).
If you were studying the effects of climate change on the geographic ranges of species living in the mountains and your climate records showed that mean temperatures were increasing, which species would you be MOST concerned about from a conservation standpoint?
-a species that is a habitat generalist and lives at low elevations
-a species that is a habitat specialist and lives at the highest elevations
-a species that is a habitat specialist and lives at low elevations
-a species that is a habitat generalist and lives at middle elevations
-a species that is a habitat specialist and lives at middle elevations
A species that is habitat specialist and lives at the highest elevation.
Explanation:
An ecosystem consist of plants, animals as well as micro-organisms but due to climate change the plants as well as animals are in danger . The case that has been provided in the question where due to climate change the temperature rises as a result the species living at the highest elevation are in problem .
Due to rise in temperature the snow is melting and the sea water level is rising. The animals and plants adapt themselves according to the climate where they are residing but suddenly if climatic change take place they will be unable to survive.
The animals which are mostly affected due to climatic change are snow leopard, polar bear, giant panda.
The interaction between the biotic and the abiotic components of an environment is called an ecosystem.
The correct option of the following is B.
The arrangement of the living material and the non-living material altogether is called an ecosystem, the abiotic and non-living materials are wind, water, gases, and etc.
The earth the different levels depending on the longitude and the latitude. Climate change is due to the increase in the amount of CO2 in the atmosphere.
The availability of the gases is very less in the highest elevation due to an increase in pressure. Therefore, climate change due to increases in Co2 will impact the highest elevation location.
Hence, the correct option is B that is - a species that is a habitat specialist and lives at the highest elevations.
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What do barbell curls and dips have in common? A. They are both leg exercises. B. They both use free weights. C. Neither exercise is isotonic. D. They are both arm exercises. Please select the best answer from the choices provided. A B C D
Explanation:
Barbell curls and dips both are arm exercise to decrease the weight of arm and musclesThis is perform by the flexing of both elbows and keeping your shoulder bone withdrewDo not allow heavy weight from lower back to arch and push up to about chest levelKeep the spine in zero potential positionDetermine the width of grip and your elbow to ought the potential position of exerciseHence the right answer is option D "they are both arm exercise"Weighted barbells are used during performing exercises that target the muscle biceps. An upper body exercise for increasing strength is called dips.
The correct option is:
Option D. They are both arm exercises.
This can be explained as:
Dips and barbell curls are the arm exercise that is for reducing the fats in arm muscles and builds triceps and biceps.They both are performed by flexing arms and withdrawing the shoulder bones.They both are used for achieving defined muscles and arms.Therefore they both are arm exercises.
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What mainly determines whether a molecule will be transported via endocytosis/exocytosis or via passive transport?
Answer:
The size of the molecule
Explanation:
Some small molecules can be transported into pur out of the cell by passive transport. Passive transport is a mechanism of transport that does not require energy, instead relying on diffusion of molecules from a high concentration of that molecule to a lower concentration of that molecule (i.e. down a concentration gradient)
Molecules that can participate in passive transport include small, uncharged molecules that can cross the phospholipid bilayer of the cell membrane such as water, carbox, dioxide and oxygen.
In contrast, endocytosis/exocytosis are types of active transport that require energy. Substances that cannot freely cross the membrane due to their size are transported into/out of the cell via a vesicle system. Endocytosis involves the cell membrane engulfing the particle to bring it into the cell, exocytosis is the reverse, where vesicular transport allows large molecules to leave the cell.
Substances that undergo endocytosis/exocytosis include cell debris, complex proteins, large macromolecules and waste material
The type of hypersensitivity reaction that is mediated by IgG or IgM antibodies directed against target antigens on specific host cell surfaces or tissues is also known as which type of hypersensitivity reaction?
Answer:
Type II Hypersensitivity
Explanation:
Hypersensitivity reactions are exaggerated immune responses that are detrimental to the host and Type II Hypersensitivity is also known as antibody-mediated hypersensitivity.
This type of hypersensitivity reaction involves humoral immunity and it occurs when IgM or IgG antibodies bind to cell surface antigens which lead to complement activation or IgG/FcγR interaction.
Clinical manifestations of Type II hypersensitivity responses include trans- fusion reactions, hemolytic disease of the newborn, autoimmune reactions to cellular antigens or tissues and hyperacute rejection of transplanted tissue.
It's easier to train a pigeon to peck for a food reward than to flap its wings for a food reward. This illustrates the importance of ________ in learning.
Answer:
It's easier to train a pigeon to peck for a food reward than to flap its wings for a food reward. This illustrates the importance of Shaping in learning.
Explanation:
The Shaping process involves the steps which makes or even tempts any individual to carry out such actions which are not natural or does not belongs to the innate system of the individual but there are some influencing factors involved for the organism which makes to under go the very process that happens.
Which is secreted by osteoblasts during bone deposition?
Osteoblasts, during bone deposition, secret an extracellular matrix made up of collagen and other proteins. This matrix is later mineralized to form bone tissue.
Explanation:The cells known as osteoblasts play a crucial role in the process of bone formation and growth. During the process of bone deposition, osteoblasts are actively involved in secreting an extracellular matrix that consists of collagen and other proteins. This matrix subsequently mineralizes to form bone tissue. Hence, in answer to your question: osteoblasts secrete an extracellular matrix, essentially made up of collagen and other proteins, during the process of bone deposition.
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Osteoblasts, which are involved in bone formation, secrete osteoid, an uncalcified matrix that hardens into bone when mineral salts are deposited onto it. Trapped within this hardened matrix, osteoblasts then transform into osteocytes, the primary and most common cell type in mature bone.
Explanation:Osteoblasts, the bone cells responsible for forming new bone, secrete osteoid, which is an uncalcified matrix. This osteoid hardens within a few days as mineral salts are deposited on it, thus entrapping the osteoblasts within. Once entrapped within this matrix, the osteoblasts transform into osteocytes, which are the primary cells of mature bone and the most common type of bone cell.
Osteoblasts are found in the growing portions of bone, including the periosteum and endosteum, and they do not divide. They synthesize and secrete the collagen matrix and calcium salts, vital components for bone formation. This process is crucial in maintaining the mineral concentration of the matrix, improving bone density, and ensuring healthy bone growth.
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How do carbohydrates contain and/or display information for cells?
Answer:
Carbohydrates may be defined as the polymers of the sugars and one of the most important biomolecule of the living organisms. Carbohydrates plays an important structural and functional role.
Carbohydrates are always present on the exoplasmic surface of the plasma membrane. The are present in the association with the proteins and lipids as glycoproteins and glycolipids. These carbohydrates acts as the signaling molecule that display information on cell surface.
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Consider the parts of the digestive system, particularly the place where water is removed before feces are excreted. Which organ is the mostly likely to be responsible for a bout of diarrhea?
Answer:
The colon.
Explanation:
The colon, also known as the large intestine is one of the major organs of the digestive system and plays a vital role in the processing of food and excretion of waste. It is divided into the ascending colon, transverse colon, descending colon and sigmoid colon.
The colon has a large surface area and plays a major role in the reabsorption of fluids and the processing and formation of waste which it pushes towards the rectum to be expelled.
Diarrhea is a condition which is characterized by frequency of bowel movements and passage of loose and watery stools. It has various causes most of which affects the normal functionality of the colon thereby limiting it's ability to reabsorb water and fluids. Such causes which affect the colon include; Bacterial infections, laxative abuse, diseases of the colon such as ulcerative colitis and Crohn's disease etc.
Based on this incomplete information, calculate the probability that if this couple has a child, the child will have sickle-cell disease. Express your answer as a fraction using the slash symbol and no spaces (for example, 1/16).
The probability that their child will have sickle-cell disease is 1/4.
Why is this correct?
Karen and Steve both have a sibling affected by sickle-cell disease. Despite neither Karen nor Steve, nor their parents, showing signs of the disease, none of them have undergone testing to confirm if they carry the sickle-cell trait.
Given this limited information, let's ascertain the probability that their child might inherit sickle-cell disease. This hereditary condition follows a recessive pattern, manifesting only if both parents carry the sickle-cell trait.
In light of their siblings' condition, it's deduced that each of their parents likely carries the sickle-cell trait. Assessing whether Karen and Steve carry the trait provides insight into the likelihood of their child inheriting the disease.
Employing a Punnett square to outline genetic possibilities:
S = Sickle-cell allele
N = Normal allele
Karen's Possible Gametes: S or N
Steve's Possible Gametes: S or N
Potential genetic combinations:
| S | N |
---------------------
S | SS | SN |
---------------------
N | SN | NN |
---------------------
For their child to develop sickle-cell disease (SS), both Karen and Steve must carry the sickle-cell trait (SN) and pass on the sickle-cell allele (S). This particular outcome arises in 1 out of 4 possibilities (SN).
Consequently, the probability that their child will have sickle-cell disease is 1/4.
Complete question:
Karen and Steve each have a sibling with sickle-cell disease. Neither Karen nor Steve nor any of their parents have the disease, and none of them have been tested to see if they have the sickle-cell trait.Based on this incomplete information, calculate the probability that if this couple has a child, the child will have sickle-cell disease. Express your answer as a fraction using the slash symbol and no spaces (for example, 1/16).
Erythropoietin is a product of the kidney. is produced in response to increased blood pressure. is produced by the red bone marrow. is found both in the plasma and inside red blood cells. inhibits the production of erythrocytes.
Answer: is produced by the red bone
Explanation:
Erythropoietin is a glycoprotein hormone produced within the marrow of long bones, and helps to stimulate the various stages of development of erthryocytes (red blood cells) through a process called erythropoiesis that also occur in the bone marrow.
Which of the following is least likely to be a source of new whole genes in a genome? A. Gene duplication B. Horizontal gene transmission C. Point mutations D. Transposable element insertion
Answer:
C. Point mutations
Explanation:
Point mutation involves the insertion or deletion of a base pair or the substitution of a single base for another in a gene. Point mutation rarely cause a significant change in a gene.
Gene duplication involves the repetition of a gene-containing DNA region in an organism. It can result from errors in DNA replication/repair and other circumstances in the cell.
Horizontal gene transmission involves the transmission of gene-carrying DNA materials between different genomes of different species of organisms.
Transposable elements are regions of DNA that have the ability to move from one place to another within the same genome. They often create a kind of mutation and change the genetic identities of cells.
The correct option is C.
A spaceship approaches the earth with a speed 0.50c. A passenger in the spaceship measures his heartbeat as 70 beats per minute. What is his heartbeat rate according to an observer that is at rest relative to the earth
Answer:
61 bpm
Explanation:
By applying the relativistic Doppler Effect;
[tex]f= f_o} \sqrt{1-\frac{v^2}{c}[/tex]
where;
frequency (f) = the heartbeat rate according to an observer that is at rest relative to the earth
[tex]f_o[/tex] = initial frequency of the heart beat = 70 beats per minutes (70 bpm)
v = speed of the spacecraft = 0.50 c
c = speed of the light
Replacing our values in the above equation; we have:
[tex]f= 70} \sqrt{1-\frac{0.5c^2}{c}[/tex]
[tex]f= 70bpm} \sqrt{1-{0.5^2}[/tex]
f = 60.62 bpm
f ≅ 61 bpm
The question is about Einstein's theory of relativity and time dilation. The apparent heartrate of an astronaut moving relative to the earth at a speed of 0.50c will appear slower from earth due to time dilation. We can calculate the dilated heartrate using the time dilation formula in special relativity.
Explanation:This question relates to Einstein's theory of relativity, specifically time dilation, which refers to the idea that time passes at different rates for different observers depending on their relative velocities and the influence of gravity.
Here, the spaceship is moving at speed, 0.50c (where c is the speed of light), relative to the earth. The astronaut's heartrate is measured to be 70 beats per minute from his perspective. According to the theory of relativity, the astronaut's clock would appear to tick slower when viewed by an earthbound observer due to time dilation.
To find the apparent heartrate as observed from earth, we use the time dilation formula in special relativity: t' = t / sqrt(1 - v^2/c^2), where t is the proper time (time measured by the astronaut), v is the relative velocity (0.50c in this case), and c is the speed of light. Plugging in the values and solving will give the dilated heartrate as observed from the earth.
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When first used in medicine in the 1940s, penicillin was uniformly effective in killing the bacterium Staphylococcus aureus. Today, ____________________ has led to an increase in antibiotic-resistant alleles, and humans are increasingly at risk from untreatable Staphylococcus aureus infections.
Answer:
When first used in medicine in the 1940s, penicillin was uniformly effective in killing the bacterium Staphylococcus aureus. Today, the Darwinian selection has led to an increase in antibiotic-resistant alleles, and humans are increasingly at risk from untreatable Staphylococcus aureus infections.
Explanation:
Those bacterias which were affected by the penicillin were filtered off from the environment since the offspring of those susceptible bacterias were decrease by time until total extinction.
But by the natural mutation of bacterias, some bacterias can originate a offspring of bacterias which were capable of resist the action of an antibiotic. Those genes could also be carried out by a plasmid conjugation creating new colonies which are resistant to the penicillin.
As a result of chronic stress associated with an intense high school weight-lifting program, a 15-year-old boy suffers an avulsion fracture of the greater tubercle of the humerus. In the ER, he displays difficulty initiating abduction of the upper limb. Which muscles was involved in this fracture?
Answer:
The muscle involved in this fracture is supraspinatus.
Explanation:
Supraspinatus is one of the rotator cuff muscles, along with infraspinatus, teres minor and subscapularis muscles. Supraspinatus is located deep to the trapezius muscle in the posterior scapular region, extending from the supraspinous fossa of scapula to the proximal humerus.
Together with the other rotator cuff muscles (infraspinatus and teres minor ), supraspinatus stabilizes the glenohumeral (shoulder) joint during the movements of the upper limb. Additionally, it assists in the abduction of the arm.
Avulsion of this structure could result in detachment of any of these rotator cuff muscles, depending upon the size and scope of the fracture. However, the wrestler is unable to initiate abduction of the upper limb, which implies damage to the supraspinatus muscle.