Synapse nerve junctions. Coloured scanning electron micrograph (SEM) of a section through nerve cells showing their synapses, the junctions between tw
Synapse nerve junctions. Coloured scanning electron micrograph (SEM) of a section through nerve cells showing their synapses, the junctions between two nerve cells. At a synapse an electrical signal is transmitted from one cell to the next in only one direction. When an electrical signal reaches a synapse it triggers the release of neurotransmitter chemicals from vesicles (bright blue) in the presynaptic cell. The neurotransmitters cross a microscopic gap called the synaptic cleft and bind to receptors on the postsynaptic cell, causing it to propagate an electrical impulse.
Size: 4974px × 3543px
Photo credit: © DR DAVID FURNESS, KEELE UNIVERSITY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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