The somatosensory system consists of three types of sensory neurons. The special somatic type of afferent sensory neurons has receptors that sense:
A) Muscle position
B) Visceral fullness
C) Temperature
D) Painful touch
Ans: A
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The somatosensory system is designed to provide the central nervous system (CNS) with information about the body. Sensory neurons can be divided into three types that vary in distribution and the type of sensation detected: general somatic, special somatic, and general visceral afferent neurons. General somatic afferent neurons have branches with widespread distribution throughout the body and with many distinct types of receptors that result in sensations such as pain, touch, and temperature. Special somatic afferent neurons have receptors located primarily in muscles, tendons, and joints. These receptors sense position and movement of the body. General visceral afferent neurons have receptors on various visceral structures and sense fullness and discomfort.
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