NROB60H3 Chapter 5: Chapter 5 Notes

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23 Apr 2011
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Synaptic transmission: /the process of information transfer a synapse. Electrical synapse: one hypothesis of synaptic transmission whereby electrical current flowed from one neuron to the next. Chemical synapses: another hypothesis of synaptic transmission whereby chemical neurotransmitters transfer information from on neuron to another at the synapse. neurotransmitter here termed vagusstoff turned out to be acetylecholine: chemical synapses comprise the majority of synapses in the brain. Synapse: specialized junction where one part of a neuron contacts and communicates with another neuron or cell type (such as muscle or glandular cell) Information flows in one direction (from neuron to target cell) Simple in structure and function and allow direct transfer of ionic current from one cell to the next. channel allows ions to pass directly from the cytoplasm of one cell to the cytoplasm of the other. Electrical synapses are common in every part of the mammalian cns. Most synaptic transmission in the mature human ns is chemical.

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