The reason the hypodermis acts as a shock absorber is that
it is located just below the epidermis and protects the dermis from shock
the major part of its makeup is adipose, which serves as an effective shock absorber
the cells that make up the hypodermis secrete a protective mucus that absorbs shock
it has no delicate nerve endings and can therefore absorb more shock
The Correct Answer is B
A. it is located just below the epidermis and protects the dermis from shock: The hypodermis is located beneath the dermis, not just the epidermis, and its role is more about cushioning and insulation rather than directly shielding the dermis from shock.
B. the major part of its makeup is adipose, which serves as an effective shock absorber: The hypodermis contains a large amount of adipose tissue that cushions underlying structures, distributes pressure, and absorbs mechanical shock.
C. the cells that make up the hypodermis secrete a protective mucus that absorbs shock: The hypodermis does not secrete mucus; this function is unrelated to connective tissue structure and physiology.
D. it has no delicate nerve endings and can therefore absorb more shock: The absence of many nerve endings does not make the hypodermis a shock absorber. Its cushioning effect is due to adipose tissue composition, not nerve distribution.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. gluconeogenesis, citric acid cycle, lipolysis:Gluconeogenesis is the synthesis of glucose from non-carbohydrate sources, and lipolysis is the breakdown of fats. Neither represents the complete oxidation of glucose for energy production.
B. glycogenesis, lipogenesis, oxidative phosphorylation of the electron transport chain:Glycogenesis and lipogenesis involve the storage of glucose and fat, respectively, rather than its breakdown for ATP production.
C. glycolysis, citric acid cycle, oxidative phosphorylation of the electron transport chain:Glycolysis breaks glucose into pyruvate in the cytoplasm. The citric acid cycle oxidizes acetyl CoA derived from pyruvate, producing NADH and FADH₂. These coenzymes then donate electrons in the electron transport chain for oxidative phosphorylation, generating ATP, completing glucose oxidation.
D. lipolysis, glycogenolysis, beta oxidation:These processes involve the breakdown of fats and glycogen, not the full oxidation of glucose, so they do not represent the standard cellular respiration pathway.
Correct Answer is C
Explanation
A. Stratified epithelia are tall, narrow cells:Stratified epithelia are defined by having multiple layers of cells, not by cell shape. While some stratified cells can be tall (columnar), they can also be cuboidal or squamous in shape, depending on the location.
B. Pseudostratified epithelia consist of at least two layers of cells stacked on top of one another:Pseudostratified epithelium appears multilayered because nuclei are at different levels, but all cells contact the basement membrane. It is not composed of multiple layers.
C. Stratified epithelia are present where protection from abrasion is important:Stratified epithelia provide multiple layers of cells, offering significant protection against mechanical stress, friction, and abrasion. This is why they are found in areas such as the skin, mouth, and esophagus.
D. Simple epithelia form impermeable barriers:Simple epithelia are composed of a single cell layer and allow for selective diffusion, absorption, or secretion rather than forming completely impermeable barriers.
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