Download A chemical crosses the gap (synapse) between a sensory neurone

A chemical crosses the gap (synapse) between a sensory neurone
and a relay neurone.
a motor neurone.
A muscle responds by contracting, a gland responds by releasing
chemical substances.
A stimulus is a change in the environment of an organism.
Impulses from a receptor pass along a sensory neurone………….
The motor neurone carries an impulse to an effector……………..
Then a chemical crosses the synapse between a relay neurone
and…………….
This is detected by a receptor such as the eye.
to the central nervous system (the co-ordinator).
which can be a muscle or a gland………….