Where are the Stretch Sensors of the Sensory Neurons Located

Question

Where are the stretch sensors of the sensory neurons located in the human knee-jerk reflex?
A) in the cartilage of the knee
B) in the quadriceps muscles on the anterior side of the thighs
C) in the hamstring muscles on the posterior side of the thighs
D) in the brain, the sensorimotor relay

Accepted Answer

The stretch sensors of the sensory neurons involved in the knee-jerk reflex are located in the quadriceps muscles on the anterior side of the thighs. These sensors detect the stretch in the muscle, which triggers the reflex action.