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Questions and Answers
Action potentials in a presynaptic cell cause the release of the chemical transmitter, which crosses a narrow ______ to interact with specific receptors on a postsynaptic cell.
cleft
The enzyme cholinesterase hydrolyzes ______ in the matrix of cleft.
acetylcholine
At the neuromuscular junction, acetylcholine binds to ______ on the muscle fiber, generating an endplate potential.
nicotinic receptors
The summation of ______ generates an action potential in the muscle fiber.
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The transfer of information from motor nerve ending to the muscle fiber through neuromuscular junction is an example of ______.
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Chemical synapses involve the release of a chemical transmitter by one cell that acts upon another cell, an example of ______.
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The axon terminal contains ______ and synaptic vesicles.
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Acetylcholine is stored temporarily in the vesicles in small packets called ______.
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The ______ membrane lines the terminal buttons of the nerve endings.
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The postsynaptic membrane contains receptor sites for acetylcholine called the ______ receptors.
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The motor endplate invaginates inside the muscle fiber and forms a depression, which is known as ______.
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The release of acetylcholine from the presynaptic terminal causes an ______ in the muscle fiber.
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When action potential reaches the axon terminal, it opens the voltage-gated ______ channels in the membrane of axon terminal.
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Acetylcholine is released from the ruptured vesicles by ______.
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Acetylcholine molecules bind with ______ receptors present in the postsynaptic membrane.
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The permeability of ______ membrane for sodium is increased by the binding of acetylcholine molecules.
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The change in resting membrane potential when an impulse reaches the neuromuscular junction is called the ______ potential.
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The release of acetylcholine from the presynaptic terminal into the ______ cleft is the first step of synaptic transmission.
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