How do neurones transmit information around the body as electrical impulses?
Receptors detect changes in their environment (stimuli) and generates nerve impulses.
The electrical impulses are passed along the axon of the cell.

The sheath acts as an electrical insulator, which speeds up electrical impulse.
They are also long, which speeds up the impulse.
Neurones have branched endings (dendrites) so they can connect with lots of other neurones.

The impulses then travel between two neurones. This is a tiny gap called the synapse.

The electrical impulses triggers the release of transmitter chemicals, which diffuse across the gap
These chemicals bind to receptor molecules in the membrane of the next neurone. This sets off a new electrical impulse.

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GCSE Biology (Module B1: Understanding Organisms) Notiz am B1d: The nervous system, erstellt von Carina C am 04/04/2016.