You stepped on a nail. List the sequential strata of the epidermis that the nail penetrated through to reach the dermis.

Question

BlackTom AI · Accepted Answer

When evaluating the question, I’ll lay out the options and examine the sequence they present from superficial to deeper epidermal layers.
Option 1: 'granulosom, spinosum, lucidum, corneum, basale' This starts with granulosom at the surface, which is incorrect because the stratum granulosum is not the outermost layer; the stratum corneum is the outermost, so this order is backwards. Additionally, the overall progression does not follow the known anatomical layering.
Option 2: 'corneum, granulosom, spinosum, basale' Here we begin with corneum correctly, but then the sequence jumps to granulosom (granulosum) before lucidum. In normal anatomy, lucidum lies between corneum and granulosum in thick skin, so omitting lucidum or placing granulosum before lucidum makes this order incorrect.
Option 3: 'corneum, granulosom, lucidum, spinosum, basale' This starts with corneum, which is good, but it places granulosom before lucidum. The correct superficial-to-deep order is corneum, lucidum, granulosum, spinosum, basale. Because lucidum should come before granulosum, this option is incorrect due to the swapped positions of lucidum and granulosum (even though the spellings vary slightly, the intended sequence is wrong).
Option 4: 'corneum, lucidum, granulosom, spinosum, basale' This option starts with corneum (valid), then lists lucidum (valid for thick skin), followed by granulosom (granulosum) and then spinosum and basale. This matches the standard superficial-to-deep sequence: corneum → lucidum → granulosum → spinosum → basale. The occasional spelling variation (granulosom) does not change the anatomical order.
In summary, the question hinges on the correct superficial-to-deep order of epidermal strata. The key concept is that the stratum corneum is the outermost layer, followed by the lucidum (in thick skin), then the granulosum, then the spinosum, and finally the basale as the deepest viable layer. Misplacing lucidum relative to granulosum or omitting lucidum breaks the accepted order, and starting with any layer other than corneum at the surface also contradicts anatomy.
Additionally, be mindful of potential misspellings: granulosom/granulosum refer to the same layer, but their position in the sequence is what determines correctness rather than spelling.
Therefore, Option 4 is the only choice that preserves the correct superficial-to-deep order of the epidermal strata traversed by a nail to reach the dermis.

You stepped on a nail. List the sequential strata of the epidermis that the nail penetrated through to reach the dermis. 单项选择题

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