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A needle would pierce the epidermal layers of the brachial region in which order?

A.

stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

B.

stratum corneum, stratum granulosum, stratum spinosum, stratum basale

C.

stratum granulosum, stratum basale, stratum spinosum, stratum corneum

D.

statum basale, stratum spinosum, stratum granulosum, stratum corneum

Answer and Explanation

The Correct Answer is B

A. stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum: This order goes from deepest to superficial. A needle would pierce the layers from superficial to deep, so this sequence is reversed.

B. stratum corneum, stratum granulosum, stratum spinosum, stratum basale: The epidermis is pierced from the outermost layer inward. The stratum corneum is the outer protective layer, followed by the stratum granulosum, stratum spinosum, and finally the stratum basale, which rests on the dermis.

C. stratum granulosum, stratum basale, stratum spinosum, stratum corneum: This order is not sequential either from superficial to deep or deep to superficial, so it does not represent the correct pathway for a needle entering the skin.

D. stratum basale, stratum spinosum, stratum granulosum, stratum corneum: This order lists the layers from deep to superficial, the opposite of how a needle would penetrate the epidermis.


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Related Questions

Correct Answer is C

Explanation

A. organism:An organism is the entire living being composed of multiple organ systems working together, not a single group of similar cells.

B. organ system:An organ system consists of multiple organs that perform related functions, but it is a higher level of organization than a single tissue.

C. tissue:Tissue is a group of cells with similar structure that work together to perform a specific or related function, such as muscle tissue contracting or epithelial tissue providing protection.

D. organ:An organ is composed of multiple tissue types working together to perform complex functions, making it a larger structural unit than a tissue.

Correct Answer is B

Explanation

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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