The Reflex Arc: Sensory, Relay and Motor Neurons

Question 1

Where are sensory neurons found and what do they do?

Answer 1

They are found in receptors such as the eyes, ears, tongue and skin and carry nerve impulses to the spinal cord and brain. When these impulses reach the brain they are translated into sensations such as vision, hearing and taste. Some stop at the spinal cord to allow for quick reflexes.

Question 2

Where are relay neurons found and what do they do?

Answer 2

Found in the brain and spinal cord and allow sensory and motor neurons to communicate

Question 3

Where are motor neurons found and what do they do?

Answer 3

Found in the CNS and control muscle movements by releasing neurotransmitters that bind to the receptors on muscles to trigger a response which causes movement.