Question

Which one of the following is the component of reflex arc?

• A. Sensory neuron
• B. Brain
• C. Motor neuron
• D. Both A and C

Answer 1

The correct option is D Both A and C

A reflex arc is a simple nervous pathway and consists of a sensory/afferent neuron, center (spinal cord), motor/efferent neuron and effector organ. The afferent/sensory neurons transmit the sensory information from sensory receptors to the spinal cord (sensory pathway). The interneurons of spinal cord integrate the incoming information and signal is relayed to motor/efferent neurons. The motor pathway transmits the signal from motor neurons to the effector organs (muscles and glands etc). Thus, reflex arc transmits the information from receptor to effector via the spinal cord. The brain is not the part of the reflex arc.

Therefore, the correct answer is option D.