PSY BEH 11A Lecture 4: Week 4 Section
18 Oct 2016
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The all or nothing action potential is: A: excitamine: neurotransmitters originating in neuron a excite neuron b by. A: increasing the voltage of neuron b: if you want a neuron to fire, you should bathe it with a transmitter substance that will. A: none of the above (stabilize its threshold, decrease its voltage, make the membrane more polarized) the human brain contains thousands of neurons, each connected to thousands of more neurons. Neurotransmitters bind to receptors influx of negatively or positively charged ions causes cell to become negative or positive. Action potential: brief increase in permeability of membrane to sodium or potassium: once triggered, it will continue all the way down axon to terminal buttons, allows calcium into cell release neurotransmitter so cycle begins again. Neurotransmitters: acetylcholine neuromuscular junction in the pns; triggers muscle contractions, gaba inhibitory transmitter found in the cns, glutamate excitatory transmitter found in the cns, serotonin, dopamine, endorphins, norepinephrine.
