Neuromuscular junction, light micrograph

Neuromuscular junction, light micrograph

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Caption: Neuromuscular junction, light micrograph. This is a junction between a nerve cell and a muscle, where the nerve passes a signal to the muscle telling it to contract. The nerve fibre (axon) runs from bottom right to centre, where it branches into several terminal boutons (red dots). Each of these meets the muscle at a synapse, a narrow gap. When the nerve signal reaches the bouton it causes the release of the neurotransmitter chemical acetylcholine. This binds to receptors on the muscle cell, causing the muscle to contract. Magnification: x1400 when printed 10 centimetres wide.

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Keywords: anatomical, anatomy, axon, biological, biology, boutons, cells, end plate, human body, light micrograph, light microscope, motor neuron, muscle, nerve cell, nervous system, neurological, neurology, neuromuscular, neuron, signal, signalling, skeletal muscle, synapse, terminal bouton, voluntary

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