During the Patellar Reflex, What Structure Acts as the Effector

Question

During the patellar reflex, what structure acts as the effector?
A)Spinal cord's posterior horn
B)Rectus femoris muscle
C)Spinal cord's anterior horn
D)Proprioceptor

Accepted Answer

The rectus femoris muscle is the effector in the patellar reflex because it is the muscle that contracts in response to the stimulus.