Synaptic vesicles contain neurotransmitters that are released by ________ when the action potential arrives.
apoptosis
sodium
hydrolysis
endocytosis
exocytosis
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Synaptic vesicles contain neurotransmitters that are released by ________ when the action potential arrives.
apoptosis
sodium
hydrolysis
endocytosis
exocytosis
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The muscle weakness of myasthenia gravis results from
a. excessive acetylcholinesterase that destroys the neurotransmitter.
b. the motor neuron action potential being too small to shock the muscle fibers.
c. insufficient acetylcholine release from presynaptic vesicles.
d. loss of acetylcholine receptors in the end-plate membrane.
e. inability of the muscle fiber to produce ATP.
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When contraction occurs,
the I bands get smaller.
the width of the A band remains constant.
the H bands get smaller.
the Z lines move closer together.
All of the answers are correct.
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