PS101 Lecture Notes - Lecture 6: Somatic Nervous System, Curare, Sympathetic Nervous System
Document Summary
Negative charge (at a resting pace: action potential. Shift in electrical charge: refractory period. All-or-none law: neuron either res or it doesn"t, intensity is conveyed by the rapidity of ring. High intensity = res quick vs low intensity = res slowly. (velocity) Synapse - (where neurons meet: structures at synapse. Transmit info between neurons: synaptic cleft. Neurotransmitters - lock and key: reuptake or enzymatic degradation, acetylcholine (helps you move, without it you can"t move) between motor neurone and voluntary muscles. Agonists excite - increase likelihood of ring (black widow) - accelerate response: black widow, won"t have enough left to breathe properly. Antagonists opposes - decreases likelihood of ring (curare) - decelerates response: same thing but with too. Monoamines - 3 neurotransmitters: dopamine - excites and inhibits mood, movement and reinforcement, norepinephrine - affects eating habits, alertness, and wakefulness. Predominant in fear: serotonin - plays role in regulating mood, sleep.
