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Nervous System (Drugs that Affect the Brain (Cocaine (Type of stimulant,…
Nervous System
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Action potential
Strong enough stimulation or nerve impulse causes Nat gates to open=>Nat rushed into cell causing depolarization (membrane potential goes towards OV or unpolarized, and momentarily becomes positively charged
If strong strong enough, depolarization occurs, threshold potential is reached and impulse is sent down axon
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K+ rush out of neuron after Na+ rush in, which causes a repolarization of the membrane back to resting potential
Spaces and ventricles
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Cerebral aqueduct
Is like a canal that passes through the midbrain and connects the third ventricle with the fourth ventricle of the brain
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Layers of Meninges
Dura Mater
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It is thick, tough and inextensible
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Divisions of PNS
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Cranial Nerves
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Oculomotor- mostly motor function- muscles of eye, eyelid, and pupillary constriction
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