Navin Kumar B. answered 02/28/23
Anatomy tutor with both research and teaching experience
The answer to the question "Has efferent motor fibers" is both systems (S,A).
Efferent motor fibers are nerve fibers that carry motor impulses away from the central nervous system (CNS) towards muscles and glands to elicit a response. The somatic nervous system (SNS) and autonomic nervous system (ANS) both have efferent motor fibers, but they differ in their target organs and the type of responses they elicit.
The SNS controls voluntary movements of skeletal muscles, which are under conscious control, and uses efferent motor fibers to activate them. The ANS controls involuntary functions of smooth muscles, cardiac muscles, and glands, which are not under conscious control, and uses efferent motor fibers to regulate them.
Therefore, both the SNS and ANS have efferent motor fibers, making the correct answer to the question "Has efferent motor fibers" S,A (both systems).