Which of the following is not a part of the knee jerk reflex arc?

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

Sensory neuron

Motor neuron

Brain

Spinal cord

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The knee jerk reflex arc is a spinal reflex pathway that does not involves the brain. The knee jerk reflex is a simple reflex that occurs when the patellar tendon is tapped with a reflex hammer. This causes a reflex action in which the quadriceps muscle contracts and the lower leg extends, resulting in the ‘knee jerk’ movement. The sensory neuron receives the sensory input from the patellar tendon and sends this information to the spinal cord. The motor neuron then sends a signal from the spinal cord to the quadriceps muscle, causing it to contract and produce the knee jerk movement. The brain is not involved in this reflex arc.

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th