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Central Nervous System. (Major parts and functions of the spinal cord…
Central Nervous System.
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Layers of the meninges;
dura mater
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dense, irregular C.T> with many blood vessels & nerves
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Spaces & ventricles
CSF: protects, cushions brain & spinal cord
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Action potential
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2) strong enough stimulation or nerve impulse causes Na+ gates to open- Na+ rush into cell causing depolarization (membrane potential goes towards OV or unpolarized & momentarily becomes positively charged
3) if a strong enough depolarization occurs, threshold potential is reached (+30) & impulse is sent down axon
K+ rush out of neuron after Na+ rush in, which causes a depolarization of the membrane back to resting potential
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