Biology - Coordination and Response

what is the central nervous system and the peripheral nervous system made up ?

the central nervous system is made up of brain and spinal cord while the peripheral nervous system is made up of nerves

what are the three types of neurones ?

sensory neurones, motor neurones and relay neurones

explain what the 3 type of neurones do 

the sensory neurones carry impulses from sensory organs to CNS. the motor neurones carry impusles from CNS to muscles and glands. the relay neurones make connections with other neurones in the CNS.

what is a reflex arc ?

a rapid and automatic response to a stimulus.

mention the format of the reflex arc

stimulus, receptor, sensory neurone, spinal cord, motor neurone, effector, response

what is a sense organ ?

receptor cells that respond to specific stimuli such as light, sound, touch, temperature and chemicals

what are the 2 main parts of the nervous system ?

central nervous system and peripheral nervous system

what is the function of the cornea ?

it retracts and focuses light entering the eye

what happens to the pupil when light hits the eye ?

Circular muscles contract, radial muscles relax and the pupil gets smaller.