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Physiology I

Neuromuscular Junction - Test 3

True or false, the neuromuscular juncion is a speicalized elecrtical synapse? False, it is a specialized chemical synapse comprised of an Alpha motor neuron and the muscle fiber it innervates
True or False, a synapse will always respond to an action potential? False, a synapse may or amy not respond whereas a junction will always respond to an action potential.
Where ar the cell bodies of Alpha Motor Neurons located? In the spinal cord or brain stem
True or false, usually each muscle fiber has only one neuromuscular junction? True
Where does the junction of nerve endings meet on the muscle fiber? midpoint to allow the action potential to travel in each direction
What is a motor unit consist of? A single motor neuron and all the muscle fibers it innervates
True or false, a single muscle fiber is controlled by a single motor unit? True
Where is the active zone of the axon terminal located? Over the subneural folds
Created by: Tri 2



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