PS101 Lecture Notes - Lecture 6: Axon Terminal, Curare, Resting Potential
Document Summary
Quiz 1 oct 5th (lh 1001) 7:00 p. m: 50 multiple choice, 5/6 are from test bank, 4 short answers, chapters 1,2, appendix b (curious george look at lesson) Firing of a neuron: resting potential, battery 70 millivolts, negative charge, action potential, stimulated, channels in membrane open, positively charged sodium ions enter, shift in electrical charge, refractory period, channels close. All-or-none law: neuron either fires or it doesn"t. Synapse where neurons meet: structures at synapse. Intensity is conveyed by the rapidity of firing: axon terminal, synaptic vesicles, sacs, stores chemicals, neurotransmitters, transmit info between neurons, synaptic cleft, gap, neurons don"t tou(cid:272)h. Neurotransmitters: reuptake or enzymatic degradation, acetylcholine between motor neurons and voluntary muscles (cid:862)lo(cid:272)k and key(cid:863, throughout nervous system, agonists excite. 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, impulsivity, aggression and appetite.
