Synapse, SEM #1
by Science Photo Library
Title
Synapse, SEM #1
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Synapse. Coloured scanning electron micrograph (SEM) of a neuromuscular junction showing a motor neurone (orange) terminating on skeletal muscle fibres (pink). The axon of a motor neurone terminates in several branching fibres, each of which ends in an end plate, a cluster of small swellings, or boutons. When activated, the boutons release neurotransmitter chemicals from small vesicles. The neurotransmitters diffuse across the gap, or synaptic cleft, separating the axon and muscle and bind with receptors in the muscle cell. Magnification x940 when printed at 10 centimetres tall.
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March 7th, 2014
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