[01:146:295] - Final Exam Guide - Everything you need to know! (36 pages long)
30 Mar 2017
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Axon membrane contains voltage-gated sodium channels: responsible for generating and propagating action potentials (no ap in. Parts: axon hillock: where axons come out of cell body; decides if action potential threshold has been reached (important, because only then will a neurotransmitter will be released at synapse, axon collaterals: branched axons. Spike (action potential) initiation zone: spike begins at the very end of the axon: cell bodies often close to the spinal cord. Glia: glue that keeps brain and nervous system together, cells in nervous systems that are not neurons, supporting functions of nerve cells. Function: fill space in between neurons, remove neurotransmitters after it has been released, so another signal can come in, regulate ion concentrations in extracellular solution. Line ventricles of the brain; cilia projecting into the ventricle (filled with cerebrospinal fluid csf) Ependymal cells to separate csf from neural cells**
