What is the body's response of the knee-jerk reflex?
A)Contraction of the hamstring muscles
B)Contraction of the abdominal muscles
C)Contraction of the quadriceps femoris muscles
D)Contraction of the gastrocnemius muscle

Question

Quizplus · Accepted Answer

The knee-jerk reflex is a monosynaptic reflex arc that involves the sensory neuron (afferent neuron) and the motor neuron (efferent neuron). When the patellar tendon is tapped, the sensory neuron detects the stretch and sends signals to the spinal cord. The spinal cord then sends signals back through the motor neuron, causing a contraction of the quadriceps femoris muscles and the extension of the lower leg. Therefore, the body's response to the knee-jerk reflex is the contraction of the quadriceps femoris muscles.

What Is the Body's Response of the Knee-Jerk Reflex