Synapse nerve junction, TEM

Synapse nerve junction, TEM

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Credit: THOMAS DEERINCK, NCMIR/SCIENCE PHOTO LIBRARY

Caption: Synapse. Coloured transmission electron micrograph (TEM) of a synapse, a junction between two nerve cells, in the brain. At a synapse an electrical signal is transmitted from one cell to the next in only one direction. The nerve cells are green, with the pre-synaptic cell at lower right and the post-synaptic cell at upper left. Mitochondria, supplying the cells with energy, are purple. When an electrical signal reaches a synapse it triggers the release of neurotransmitter chemicals from vesicles (red) at the end of the presynaptic cell. The neurotransmitters cross a microscopic gap and bind to receptors on the post- synaptic cell. Magnification: 50,000x when printed 10 centimetres across.

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Keywords: anatomical, anatomy, axon, biological, biology, brain, cells, central, cerebral, cns, coloured, false-coloured, grey matter, histological, histology, human body, junction, message, micrograph, nerotransmitter, nerve cell, nervous, nervous system, neural, neurological, neurology, neuron, neurone, neurones, neurons, physiological, physiology, relay, relaying, signal, signals, synapse, synaptic, system, tem, transmission electron, transmission electron microscope, transmitting, vesicle, vesicles

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