Question

a splinter penetrated into the skin of the sole of the foot, almost to the papillary region of the dermis. which layer of the epidermis would be the final layer injured? granulosum lucidum basale spinosum

Explanation:

The epidermis of thick skin (like on the sole of the foot) has five layers: corneum, lucidum, granulosum, spinosum, and basale. The papillary region of the dermis is adjacent to the epidermis. Moving from the surface (corneum) inward, the order is corneum - lucidum - granulosum - spinosum - basale. If the splinter is almost to the papillary region (closest to the dermis), the last epidermal layer it would pass through (i.e., the final layer injured) is the basale layer. The basale layer is the deepest layer of the epidermis, adjacent to the dermis.

Answer:

basale