Question

Reflex action in a vertebrate is an essential display exhibited by

• A. Sympathetic nerve
• B. Motor nerve
• C. Sensory nerve
• D. Autonomic response

Answer 1

The correct option is B Motor nerve

Reflex actions in humans are controlled by the reflex arc. A reflex arc is the pathway from the stimulus to sensory neuron to motor neuron to reflex muscle movement. During reflex action, the signal does not pass directly to the brain but sensory neuron connects to the motor neuron in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor nerves.

Thus, the correct answer is option B.