The muscle action potentials that initiate contraction are transmitted from the sarcolemma into the interior of the muscle fiber by __________.
the sarcoplasmic reticulum
T tubules
myofibrils
myofilaments
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Inside a muscle, bundles of single muscle fibers form __________.
T tubules
sarcomeres
fascicles
thick filaments
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The role of acetylcholinesterase in the neuromuscular junction is to __________.
generate a muscle action potential
remove acetylcholine from the synaptic cleft
increase the sodium permeability of the motor end plate
release acetylcholine from the synaptic terminal
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Acetylcholine receptors are primarily located __________.
inside vesicles
on the synaptic terminal
inside the muscle fiber
on the motor end plate
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