The final efferent organ of the knee jerk reflex is the quadriceps femoris muscle.

Question

Quizplus · Accepted Answer

The quadriceps femoris muscle is the target muscle of the knee jerk reflex, which is an example of a stretch reflex. When the patellar tendon is tapped, it stretches the muscle spindles in the quadriceps femoris muscle, triggering an afferent impulse that travels to the spinal cord. This impulse synapses with a motor neuron, which then signals the quadriceps femoris muscle to contract, causing the leg to jerk forward.

The Final Efferent Organ of the Knee Jerk Reflex Is