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Muscle tissue

TermDefinition
Irritability The ability to receive and respond to a stimulus
Contractility The ability to shorten (forcibly) when an adequate stimulus is received
Motor Unit One neuron and all the skeletal muscle cells it stimulates (figure 6.4)
Neuromuscular Junctions When a long threadlike extension of the neuron, called the nerve fiber or exon, reaches the muscle, it branches into a number of axonal terminals, each of which forms junctions with the sarcolemma of a different muscle cell (figure 6.5)
Synaptic Cleft The gap between the endings of the muscle cells' membrane.
Neurotransmitter A chemical released when the nerve impulse reaches the axonal terminals
Acetylcholine or ACh The specific neurotransmitter that stimulates the muscle cell.
Action Potential The "upset" caused by a rushing intake of sodium ions (Na+) through the muscle
Created by: mkoch
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