understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses
Neurons:
Nerve cells are different from other cells, they do have a cell membrane, cytoplasm and nucleus, but they are different shape.
Part of the cell is stretched out to form the axon.
The axon can be over a metre long.
How the messages are carried:
The messages that nerves carry are called nerve impulses
They are electrical signals.
They pass very quickly along the axon of the neurone.
Each impulse is separate from the next, one after the other
some axons have a fatty sheath around them.
this insulated the axon and makes the impulse travel faster.
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