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. chondrocyte:Chondrocytes are specialized cells found in cartilage tissue. They produce and maintain the cartilaginous extracellular matrix and are not present in areolar connective tissue.
B. mast cell:Mast cells are abundant in areolar connective tissue and play a key role in inflammation by releasing histamine and other chemical mediators during immune responses.
C. macrophage:Macrophages are present in areolar connective tissue, where they function in phagocytosis to remove pathogens, debris, and damaged cells.
D. fibroblast:Fibroblasts are the most common cells in areolar connective tissue. They produce fibers such as collagen and elastin, as well as the extracellular matrix that provides structural support.
Correct Answer is B
Explanation
False:On mRNA, three sequential nucleotides are referred to as a codon. Codons are read during translation to direct the incorporation of specific amino acids into a growing polypeptide chain. A triplet refers to three sequential bases on DNA, which together code for one amino acid. This terminology applies specifically to DNA rather than mRNA.
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