Reflex arc

Question 1

What are the stages of reflex arc?

Answer 1

1. Receptor is stimulated and formulate message (i.e. nerve impulse)
2. Sensory neuron takes the message to the central nervous system [spinal cord]
3. Interneuron passes the message to a motor neuron
4. Motor neuron takes the message away from the C.N.S to the effector [Muscle/Organ]
5. The muscle receives the message and contracts

Question 2

What are reflexes?

Answer 2

They are automatic involuntary responses to changes occurring inside or outside the body