Which of the following would occur if you touched a hot object with your right hand?
A. A stretch reflex would be triggered that would cause contraction of extensor muscles in the right arm.
B. Nociceptors send pain information to the cerebral cortex, and descending activation of alpha motor neurons to extensor muscles would make you withdraw your right hand from the object.
C. A withdrawal reflex would be triggered by stretch receptors that would inhibit contraction of extensor muscles of the right arm.
D. A withdrawal reflex would be triggered by nociceptors that would stimulate contraction of flexor muscles in the right arm.
E. Reflex mechanisms would stimulate contraction of the extensor muscles of the right arm.
Answer: D
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