Synaptic Transmission at the Axon Terminal

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8 Terms

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step 1

set the stage: Ca2+ pump pumps Ca2+ out of the cell

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step 2

an action potential comes down the axon to the axon terminal which cause

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step 3

voltage-gated Ca2+ channels open so

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step 4

Ca2+ rushes in cause

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step 5

vesicles of neurotransmitters fuse with membrane dumping neurotransmitters into synapse

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step 6

neurotransmitters diffuse across synapse and

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step 7

bind receptors on postsynaptic membrane

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step 8

then neurotransmitters must be cleaned up - either broken down by enzymes or picked back up by endocytosis