The Human Knee-Jerk Reflex Requires an Intact

Question

The human knee-jerk reflex requires an intact
A)spinal cord.
B)hypothalamus.
C)corpus callosum.
D)cerebellum.
E)medulla.

Accepted Answer

The knee-jerk reflex is a simple spinal reflex that occurs in response to tapping or striking the tendon just below the kneecap. This reflex arc only involves the sensory and motor neurons in the spinal cord, thus an intact spinal cord is necessary for the knee-jerk reflex to occur. The hypothalamus, corpus callosum, cerebellum, and medulla are not directly involved in this reflex.