The knee-jerk reflex is controlled by interneurons in the
A) synaptic gap.
B) spinal cord.
C) sympathetic nervous system.
D) parasympathetic nervous system.

Question

Quizplus · Accepted Answer

The knee-jerk reflex is a reflex arc controlled by interneurons in the spinal cord. When the patellar tendon is tapped, sensory neurons send signals to the spinal cord, where interneurons relay the information back to motor neurons that cause the leg to kick. The sympathetic and parasympathetic nervous systems are not directly involved in this reflex. The synaptic gap is the tiny space between neurons where neurotransmitters are released, and it does not play a role in the knee-jerk reflex.

The Knee-Jerk Reflex Is Controlled by Interneurons in the