Tuesday, January 31, 2012

2.84 - stimulation of receptors

- neurons have branched nerve endings to pass on signals
- nerve endings don't touch but there is a small gap between them. when a pulse arrives the chemicals are released and pass along through diffusion
- neutrons are wrapped by a layer of fat and protein which insulates cells and allows impulses to travel faster
- neutrons are usually grouped together in bundles called nerves

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