Which of the following physiologic principles would be considered a function of the somatic nervous system?
A) The act of typing a report using a computer keyboard
B) Withdrawing the hand after touching a hot surface
C) The patellar reflex "knee jerk" activated by tapping the patellar tendon abdominal viscera
D) The beginning of depolarization in the cardiac conduction of impulses
Ans: A
Feedback:
The somatic nervous system provides sensory and motor innervation for all parts of the central nervous system (CNS) and peripheral nervous system (PNS) except viscera, smooth muscle, and glands. The autonomic nervous system (ANS) provides efferent motor innervation to smooth muscle, the conducting system of the heart, and glands.
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