PSYCHOLOGY DAY 6

PSYCHOLOGY DAY 6 - PSYCHOLOGY DAY 6 - Action potential is...

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PSYCHOLOGY DAY 6 - Action potential is fired when the voltage reached -55mV - Process of neurotransmission o Neurotransmitters: chemical messenger which diffuse across synapses & activate receptor site of adjacent cells Excitatory: cause depolarization, inflow of sodium or other positive ions. These are “yes” votes. Inhibitory: cause hyperpolarization and positive ions flow out and negative ions flow in. these are “no” votes There are both excitatory and inhibitory terminals Excitatory – inhibitory signals o Is there enough excitatory to initiate an action potential Summation of postsynaptic potential PSPs can add together or cancel each other out Temporal summation (added over time) Spatial summation (occurring in more than one terminal on the neuron; can also add up) The neural impulse After an impulse passes any point on the axon, the o
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This note was uploaded on 03/27/2012 for the course PSYCHOLOGY 1000 taught by Professor Fazakas-dehoog during the Spring '11 term at UWO.

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PSYCHOLOGY DAY 6 - PSYCHOLOGY DAY 6 - Action potential is...

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