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| Description: 2 The axon terminal stores neurotransmitter ( green) inside synaptic vesicles. 3 The arrival of an action potential at an axon terminal causes calcium ions (Ca++) to enter the neuron. 4 The influx of Ca++ causes exocytosis of synaptic vesicles, so neurotransmitter is released into the synaptic cleft. Picture Stats: Views: 82 Filesize: 139.18kB Height: 1262 Width: 1500 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47713 |