Question

Find the odd one out among the components that are involved in a reflex arc.

• A. Afferent neuron
• B. Relay neuron
• C. Effector organ
• D. All of the above

Answer 1

The correct option is D All of the above

• The sequence of events in a reflex arc is as follows:
• The sensory neuron, collects sensory information in the form of stimulus (e.g. heat), from the sensory organs (e.g. skin).
• The sensory neuron passes the impulse to the relay neuron present in the spinal cord.
• The nerve impulse is now passed on to the motor neuron.
• Motor neuron passes the information to the effector organ (e.g muscle) and accordingly, the movement occurs (e.g removing the hand away from the heated surface)
• So, the correct option is B.