A splinter penetrated into the skin of the sole of the foot, just superficial to the dermis. Which layer of the epidermis would be the final layer injured?
statum granulosum
stratum basale
statum lucidum
stratum corneum
stratum spinosum
The Correct Answer is B
A. stratum granulosum: The stratum granulosum is a middle layer of the epidermis where keratinization begins. A splinter superficial to the dermis would pass through this layer, but it is not the deepest epidermal layer affected.
B. stratum basale: The stratum basale is the deepest layer of the epidermis, located directly above the dermis. A splinter penetrating just superficial to the dermis would reach this layer last, affecting the basal cells responsible for generating new epidermal cells.
C. stratum lucidum: The stratum lucidum is found only in thick, hairless skin such as the palms and soles, but it lies above the stratum granulosum. While a splinter in the sole could pass through this layer, it would not be the final epidermal layer injured.
D. stratum corneum: The stratum corneum is the outermost layer of dead keratinized cells. It would be the first layer penetrated by the splinter, not the final layer injured.
E. stratum spinosum: The stratum spinosum is located above the stratum basale and below the stratum granulosum. A splinter would pass through this layer before reaching the stratum basale, making it an earlier layer affected rather than the final layer injured.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Holocrine:Holocrine glands release their secretions by the disintegration of entire cells, which become part of the secretion. Sebaceous glands in the skin are an example, producing oily secretions that include cell fragments.
B. Merocrine:Merocrine glands secrete their products via exocytosis without the loss of cellular material. Sweat glands are an example, and their secretion does not contain disintegrated cells.
C. Mucous:Mucous glands primarily secrete mucus, a viscous fluid rich in glycoproteins, but this secretion is not composed of disintegrated cells.
D. Exocrine:Exocrine glands are a broad category of glands that secrete products onto epithelial surfaces through ducts. They include holocrine, merocrine, and apocrine types, so this term does not specifically indicate secretion by cell disintegration.
Correct Answer is B
Explanation
False:Cellular respiration is a catabolic reaction because it breaks down glucose into carbon dioxide and water while releasing ATP. The breakdown of molecules to generate usable energy is characteristic of catabolic processes, not anabolic ones.
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