Answer:
Explanation:
The densest layer is the solid metal inner core, the mantle is of intermediate density, and the least dense layer is the lithosphere, particularly the continental lithosphere.
Brainiest please thx.
List 2 types of bone tissue.
Answer:
Cortical Bone and Cancellous Bone
Explanation:
They're both bone tissue.
The __________ lineage of cells is mostly innate in function while the __________ is mostly adaptive. (though there is, of course, overlap in function).
a) myeloid; lymphoid
b) lymphoid; myeloid
c) hematopoietic; lymphatic
d) mesenchymal; hematopoietic
Answer:
d) mesenchymal; hematopoietic
Explanation:
The mesenchymal lineage of cells is mostly innate in function while the hematopoietic is mostly adaptive. (though there is, of course, overlap in function).
Which of these statements is true?
A. The left coronary artery is a branch of the left pulmonary vein.
B. The coronary sinus returns blood to the left atrium.
C. The coronary arteries arise from the pulmonary trunk.
D. The great cardiac vein collects blood from the anterior surface of the heart.
E. The pulmonary arteries carry blood to the left atrium
As per the choice of questions the great
The Conroy vein or the great cardiac vein is responsible for draining the deoxygenated blood from the cardiac chambers. This vein consists of metabolic wastes. The great cardiac vein receives tributary from the left ventricle ad atrium. The stern costal surface of the heart is convex form.Hence the correct option is D.
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Animal behavior is fully described as:A. necessary for survival B. necessary for reproduction C. an action in response to a stimulus. D. All of the above. E. A and B.
the answer is a a and b beacuse c is a dumb answer and i had this question before hope it helps !!!
Answer:
Animal behavior is fully described as
D - ALL OF THE ABOVE
40) When blood pressure is normal, the receptors in arterial walls fire action potentialsA) continuously.B) very seldom
Answer:
continuously
Explanation:
The process by which gametes combined to form a zygote is called
a) parthenogenesis
b)mitosis
c)meiosis
d)fertilization
Answer:
D) fertilization
Explanation:
Fertilization is the name given to the fusion of male and female gametes. By themselves, female egg cells -- called ova -- and male sperm cells cannot grow and divide. However, once a sperm cell breaks through the egg cell membrane, the genetic material combines and the new organism begins to grow and develop as a living thing.
True of False: Hemoglobin releases the same amount of oxygen to all the tissues regardless of variations in their metabolic rate.
Answer: False
Explanation:
Hemoglobin can be defined as red protein that transports oxygen to various parts of the body according to its need.
It does not transports the same amount of oxygen to all the tissues. Some tissues of the body might require more more oxygen and some cells might require less amount of oxygen.
It depends on the state of activity. It transports more oxygen to the tissue that require it the most.
Example: The skeletal muscles of the body require more oxygen and it can be more than 80% .
Hence, the given statement is false and hemoglobin does not releases the same amount of oxygen to each and every tissue of the body.
The amount of oxygen hemoglobin releases varies with the metabolic rates of tissues. High metabolic activity tissues receive more oxygen—as more oxygen molecules dissociate from the hemoglobin—than the less active ones.
Explanation:The statement that Hemoglobin releases the same amount of oxygen to all the tissues regardless of variations in their metabolic rate is False. The oxygen-hemoglobin saturation/dissociation curve mechanisms regulate the amount of oxygen delivered to different tissues. Highly active tissues have high metabolic rates and therefore require more oxygen. Oxygen molecules dissociate from hemoglobin and enter these tissues due to the high difference in the partial pressure of oxygen between the tissues and the blood in the capillaries. Conversely, less active tissues like adipose tissues, which have lower metabolic rates, consume less oxygen. Hence, the partial pressure of oxygen within such tissues remains relatively high leading to fewer oxygen molecules dissociating from hemoglobin and entering the tissue interstitial fluid. Therefore, the amount of oxygen hemoglobin releases to tissues varies based on their metabolic rates.
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Which major tissue type functions to line and cover the body?
Answer:
epithelial tissue is the major tissue type functions to line up and cover the body
The cells of the macula densa and the juxtaglomerular cells form the?
A) renal corpuscle
B) afferent arteriole
C) nephron loop (loop of Henle)
D) filtration membrane
E) juxtaglomerular complex
Answer:
E. juxtaglomerular complex
Explanation:
Macula densa cells are the columnar tubule cells. They are present in the wall of afferent arterioles. The modified fibers of smooth muscles present in the lining of the afferent arteriole are called juxtaglomerular cells.
The juxtaglomerular cells and macula densa cells together make the juxtaglomerular apparatus, also called juxtaglomerular complex. The function of the juxtaglomerular apparatus is to maintain the blood pressure of kidneys.
Answer:
The correct answer is E) juxtaglomerular complex
Explanation:
The smooth muscle cells of both the afferent and efferent arterioles are swollen and contain dark granules. These cells are called Juxtaglomerular cells. These cells secret Renin which convert angiotensinogen into angiotensin.
The epithelial cells of the distal convoluted tubules that comes in contact with the afferent and efferent arterioles are more dense than the other tubular cells and are collectively called muscula densa. The cells of the mascula densa may function as chemoreceptors; feeding information to the juxtaglomerular cells. The juxtaglomerular cells and macula densa together form juxtaglomerular complex.
Mutations in DNA include deletions and insertions. These types of mutations:
A) Result in different amino acids to be read due to frame shifts
B) Result in segments of DNA being translocated in the genome
C) Increase the frequency of polyploidy
D) Always result in disease or harmful effects
e) All of these
Answer:
(A). Result in different amino acids to be read due to frame shifts
Explanation:
Insertion or deletion mutations (or Indel mutations) can be defined as mutations in DNA due to insertion (addition) or deletion of nucleotide bases in DNA.
These mutations lead to change in reading frames (sequence of codons), which leads to formation of protein having completely different amino acid sequence. Hence, these mutations are also cause frameshift mutations.
This is due due to triplet nature of genetic codes as insertion or deletion of one or more bases (but not three) would change change in codon sequence and mutated sequence can form a non-functional or truncated protein.
Thus, the correct answer is option (A).
Body systems are not completely independent they integrate and work together describe one example of the integration between body systems
Examples would be the sensory system and nervous system, circulatory system and respiratory system, circulatory system and digestive system.
Digestive system digests food and absorbs it into blood vessels surrounding the gastro intestinal tract. Nutrients are taken by blood to the heart and pumped to all organs for use.(circulatory systems function).
Which of the following is a muscle for chewing (mastication)?
a. sternohyoid
b. orbicularis oris
c. scalenes
d. temporalis
Answer:
The muscles of the jaw consist of three muscles the Temporalis, Masseter and Pterygoid Muscles which work together to move the mandible at the Temporomandibular Joint.
Explanation:
Final answer:
The muscle responsible for chewing, among the given options, is the temporalis. The masseter is another major muscle for mastication. The sternohyoid, orbicularis oris, and scalenes have other functions like swallowing, moving lips, and assisting neck movement respectively.
Explanation:
Among the options provided, the temporalis muscle is the one that is responsible for chewing, also known as mastication. It is one of the chief muscles of mastication and is located in the temple. The temporalis muscle is attached to the lower jaw and when it contracts, it assists in closing the mouth by moving the mandible upward and backward.
In contrast to the temporalis, the masseter is another major muscle used for chewing because it elevates the mandible to close the mouth. This strong muscle is found in the cheek and plays a vital role in mastication. Both the temporalis and the masseter work together to exert the pressure necessary to bite and chew food before swallowing.
There are ___________ pair of true ribs.
Answer:
7
Explanation:
There are 12 total pairs of ribs. 1-7 are attached directly to the sternum by costal cartilages, making them true pairs. 8-10 are fake pairs, which means they're attached indirectly to the sternum. And 11 and 12 and free floating ribs, meaning they aren't attached.
Which graph BEST shows the relationship of kinetic energy (solid line) to potential energy (dotted line) as a hawk dives downward toward its prey and then returns to its original position in the air?
A) A
B) B
C) C
D) D
Answer:
b
Explanation:
hope im right
The kinetic and potential energy of the hawk as it dives and returns to its original position are inversely related, with one increasing as the other decreases.
Explanation:The relationship of kinetic energy (represented by a solid line) to potential energy (represented by a dotted line) as a hawk dives towards its prey and then returns to its original position in the air would be best shown by a graph in which the kinetic energy increases as the potential energy decreases, and vice versa.
As the hawk dives (loses altitude), its potential energy (height) decreases, but its kinetic energy (speed) increases. When the hawk returns to its original position (regains altitude), its kinetic energy decreases while its potential energy increases. Therefore, the kinetic and potential energies should be inversely related on the graph.
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All of the following are possible steps of scientific investigation except for ________. (a) the collection of scientific facts through observation and measurement (b) development of observations and experiments to test the hypotheses (c) the development of one or more working hypotheses or models to explain facts (d) assumption of conclusions without prior experimentation or observatio
Answer: (d) Assumption of conclusions without prior experimentation or observation.
Explanation:
A scientific investigation can be define as a fact finding inquiry which involves the detailed step by step procedure for answering the questions related to science. It involves steps like making an observation, creating a hypothesis, making a prediction depending upon the hypothesis, experimentation and analysis.
(d) Assumption of conclusions without prior experimentation or observation. is the correct option this is because of the fact that in a scientific investigation an assumption cannot be made. The assumption cannot lead to conclusive results and finding cannot be considered as reliable.
Children's long bones have growth plates called?
Answer:
The growth plate, also known as the epiphyseal plate
Explanation:
or physis, is the area of growing tissue near the ends of the long bones in children and adolescents. Each long bone has at least two growth plates; one at each end
MHC class II will interact with a TCR and
Question 20 options:
A)
CD8 on the surface of cytotoxic T-cells
B)
CD4 on the surface of cytotoxic T-cells
C)
CD4 on the surface of helper T-cells
D)
CD8 on the surface of helper T-cells
Answer:
CD4 on the surface of helper T-cells.
Explanation:
MHC class II ( major histocompatibility complex) molecules are processed from the exogenous source. The presentation of antigen on cells are important for the adaptive immune response.
MHC class II interact with CD 4 present on the surface of T helper cells. This interaction is important for the generation of an immune response. Helper T cells can release cytokines and can perform phagocytosis.
Thus, the correct answer is option (C).
match each description to the appropriate biome
Answer:
desert
taiga
tropical savanna
tundra
tropical rainforest
Explanation:
1. Desert
2. Tundra
3.Tropical savanna
4. Taiga
5. Tropical rainforest
What are the different types of biomes?Tropical Rainforests: These locations (typically around the equator) receive year-round rain, making them lush with tropical plants, trees, rivers, streams, and rich, fertile soil.Temperate Forests: Unlike tropical rainforests, temperate forests have four distinct seasons and many evergreen and deciduous trees, which shed their leaves in the fall and winter.Taiga: Boreal forests are another name for taiga. The taiga, the largest of the seven land biomes, is dominated by conifers such as fir, pine, and cedar, which have needle-shaped leaves.Deserts: are known for their hot, dry summers and very cold winters. Because most deserts receive minimal rainfall, certain plants have developed to store water in order to flourish.Savanna: Unlike grasslands, savannas get enough rain to support trees in clusters or strewn throughout the landscape. Tundra: In the summer, large swathes of territory characterized by flat, frigid plains support short grasses, plants, and green moss.learn more of biomes here:
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The principle action of the anaerobic phase of glycolysis (fast glycolysis) is to:
a. degrade glucose or glycogen into pyruvic acid or lactic acid and produce some ATP
b. form NADH and FADH
c. degrade lactic acid to pyruvic acid
d. generate high-energy compounds such as GTP
Answer:
glucose to ATP and NADH - an electron carrier
Which one of the following is helpful in the treatment of early ejaculation?
a.
the use of dilators
b.
rear entry coitus
c.
erotic fantasy
d.
the squeeze technique
0.75 points
Answer: The squeeze technique.
Explanation:
The squeeze technique method is used to delay the early ejaculation that takes place at the time of coitus.
In this technique stimulation of penis is done until one feels ready for ejaculation.
The partner uses squeeze and pause technique at the end of the penis basically the at the point where the head joins the shaft, needs to be squeezed for several seconds until the urge to ejaculate passes.
Hence, the correct answer is "Option d "
Difference between gram positive and negative bacteria
The difference between gram positive and gram negative is the stuctural difference in the cell walls
The Brain stem area of the brain includes following 3 structures: ___________ for eye movement/walking; and ___________ to help regulate respiration and the _________________ that regulates heartbeat and breathing.
Answer:
The Brain stem area of the brain includes following 3 structures: mid brain for eye movement/walking; and pons to help regulate respiration and the medulla oblongata that regulates heartbeat and breathing.
Explanation:
The superior colliculi are the nuclei present in white matter of the midbrain and serve as visual reflex centers. These nuclei are involved in the coordination of eye movement when we follow a moving object.
The dopamine-releasing neurons present in the substantia nigra of midbrain regulate the body movement.
The cardiac center and respiration center (chemoreceptors) present in medulla regulate the heart rate and breathing rate respectively.
The pneumotaxic center of the pons is a nucleus involved in the regulation of inspiration and expiration during respiration and thereby regulate the rate of respiration.
Everyone at one time or another has had a hard time getting to sleep. What are some ways to overcome insomnia without drugs?
Answer:
Explanation:
Insomnia is a condition in which a person experience lack of sleep. This involves conditions like difficulty in sleeping, waking in middle of the night, early morning awakening and non restful sleep.
Following are the ways to overcome insomnia without drugs.
1. A person should stick to regular sleeping habit.
2. Must not take much caffeine.
3. Must take proper diet specially dinner.
4. Must take bath before sleep.
5. Must make sure the sleeping environment is relaxing and suitable for sleeping.
6. Must use earplugs and eye mask if the environment is unsuitable like noise or unnecessary glare.
Which of the following CORRECTLY describes the flow of lymph?
(a) Subclavian vein, Collecting duct, Lymphatic trunk, Lymphatic vessel, Lymphatic capillary
(b) Lymphatic capillary, Lymphatic vessel, Lymphatic trunk, Collecting duct, Subclavian vein
(c) Lymphatic vessel, Lymphatic capillary, Subclavian vein, Collecting duct, Lymphatic trunk
(d) Collecting duct, Lymphatic trunk, Lymphatic vessel, Lymphatic capillary, Subclavian vein
Answer:
The correct answer is option b.
Explanation:
The lymphatic pathway is a circuit where the lymphatic fluid is towards subclavian vein at the base of the neck. It is an open circulation pathway.
Body tissues have capillaries that reabsorb extra tissue fluid which is comes from blood plasma. Tissue fluid is move from lymphatic capillaries to lymphatic vessels, where lymph nodes filter the lymph.
It moves from lymphatic vessels into lymphatic trunks. Finally, it enters in collecting ducts and disposed into the subclavian veins at the base of the neck.
Thus, the correct answer is option b.
The correct order describing the flow of lymph is from the Lymphatic capillary, to the Lymphatic vessel, then to the Lymphatic trunk, Collecting duct, and finally the Subclavian vein.
Explanation:The flow of lymph in the body typically follows a specific pathway. As per the options provided, a correct representation of this lymphatic flow would be: (b) Lymphatic capillary, Lymphatic vessel, Lymphatic trunk, Collecting duct, Subclavian vein. The lymph fluid first enters small, blind-ended lymphatic capillaries. These capillaries then unite to form larger lymphatic vessels, which deliver lymph into the larger lymphatic trunks. The lymphatic trunks drain into two main collecting ducts, the thoracic duct and the right lymphatic duct, which in turn empty their contents into the subclavian veins, thus returning the lymph back into the circulatory system.
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Describe how you demonstrated muscle fatigue in the laboratory, and describe the changes within the muscle that may help to explain how fatigue is produced.
Do small cells have a large surface area
Answer:
Yes
Explanation:
Small cells function more effectively because they have a larger surface area to volume ratio than do large cells which have smaller surface area to volume ratio.
The I band contains only _______ filaments.
Answer: Thick filaments
Explanation:
Answer:
Thin
Explanation:
The I band contains only thin filaments. :)
Kussmaul respirations are an indication that the body is
Answer:
Kussmaul respirations indicates the condition of acidosis and diabtetes ketoacidosis
Explanation:
Kussmaul respiration refers to the labored and deep breathing pattern. Adolph kussmaul introduced the term Kussmaul respiration.
This respiration refers to the form of hyperventilation in which the amount of carbon dioxide is decreased in the blood. The metabolic acidosis alters the normal pattern of breathing and results in rapid and shallow breathing. The Kussmaul respiration is most common in ketoacidosis.
Kussmaul respirations indicate the body's attempt to compensate for metabolic acidosis by hyperventilating to expel carbon dioxide and reduce acidity.
Explanation:Kussmaul respirations are a type of hyperventilation that is characteristically deep and labored. They are an indication that the body is compensating for metabolic acidosis, particularly when associated with diabetic ketoacidosis. In metabolic acidosis, the blood pH is low due to an excess of acid or a deficiency of bicarbonate. Kussmaul respirations occur as a respiratory compensation mechanism where the body attempts to correct this imbalance by exhaling more carbon dioxide (CO2), which is an acid when dissolved in the blood.
The increased respiratory rate and depth result from the body's need to lower blood acidity by releasing CO2. This compensatory mechanism can be observed in several conditions that cause metabolic acidosis, such as renal failure, and is often a serious sign that requires medical attention.
True or False. Helper T cells secrete chemicals known as cytokines which cause proliferation of B cells into antibody-secreting plasma cells and memory B cells.
Answer:
True
Explanation:
There are several types of cytokines used in cell signaling; interferons, interleukins, tumor necrotic factor, and chemokines. T helper cells mainly produce interleukins. When activated by Antigen-Presenting-cells, t-helper cells produce interleukins that activate B cells and is significant in their proliferation during an infection.
These are all hypothalamic hormones except
a. thyrotropin releasing hormone (TRH)
b. antidluretic hormone (ADH)
c. luteinizing hormone (LH)
d. prolactin-inhibiting hormone (PIH)
Answer:
The correct answer is luteinizing hormone.
Explanation:
Hypothalamus has two sets of nerve cells that produce hormones. One set sends the hormones that are anti-diuretic hormone and oxytocin. ADH regulates or water in the bloodstream by reabsorption of water at the kidney and oxytocin helps in pregnancy and breastfeeding.
The other set produces hormones growth regulating, stress releasing and stimulating and inhibiting hormones are dopamine, corticotrophin-releasing hormone, growth hormone-releasing hormone, gonadotropin-releasing hormone, somatostatin, and thyrotropin-releasing hormone.
Luteinizing hormone is secreted by the pituitary gland. It is one of the main hormones that control the reproductive system.
Thus, the correct answer is luteinizing hormone.