The patellar "knee jerk" reflex is an example of ________.
A) a stress reflex
B) an extensor thrust reflex
C) a stretch reflex
D) a crossed-extensor reflex

Question

Quizplus · Accepted Answer

The patellar knee jerk reflex is a type of stretch reflex, which is a rapid, automatic response to a stretch stimulus in a muscle. When the patellar tendon is tapped, it stretches the quadriceps muscle and activates sensory receptors, which then quickly send a signal to the spinal cord. The spinal cord then responds by activating motor neurons that cause the quadriceps muscle to contract, leading to the extension of the leg.

The Patellar "Knee Jerk" Reflex Is an Example of ________