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| Description: The synapse and synaptic transmission. (a) A thin cleft, called the synapse, separates one cell from another. (b) An electron micrograph of a synapse between two nerve cells. (c) As a nerve impulse arrives at the synapse, it triggers the release of a chemical neurotransmitter from storage vesicles in the presynaptic cell. The neurotransmitters diffuse across the synapse and bind to receptors on the membrane of the postsynaptic cell, where they trigger another nerve impulse by allowing ions into the postsynaptic cell. Plasma membrane of an axon ending of a presynaptic cell Synaptic Membrane receptor for Plasma membrane (a) cleft neurotransmitter of postsynaptic cell Presynaptic cell Synaptic cleft Postsynaptic cell (b) Dr Constantino Soleln Ions (red) that affect Molecule of membrane excitability neurotransmitter synaptic cleft Receptor for the neurotransmitter on gated channel protein in plasma membrane of postsynaptic cell (C) (D Cengage Learning Picture Stats: Views: 275 Filesize: 215.2kB Height: 1500 Width: 794 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=45079 |