Red Seal Cosmetology Practice Exam

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To what are motor nerve fibers distributed?

  1. Arrector pili muscles attached to the hair follicles

  2. Secretory glands

  3. Stratum corneum

  4. Papillary layer

The correct answer is: Arrector pili muscles attached to the hair follicles

Motor nerve fibers are nerve fibers that carry messages from the central nervous system to muscles or glands. In this question, we are looking for what specifically motor nerve fibers are distributed to. Options B, C, and D are incorrect because they do not relate to muscles, which is what motor nerve fibers are specifically connected to. Secretory glands (option B) are not directly connected to muscles, but instead secrete substances such as sweat. The stratum corneum (option C) is the outermost layer of the skin and does not contain muscles. The papillary layer (option D) refers to the upper layer of the dermis, which also does not contain muscles. Option A is correct because motor nerve fibers are distributed to the arrector pili muscles, which are tiny muscles attached to hair follicles that are responsible for causing goosebumps. Therefore, A is

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