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Process from Action Potential to Release of Neurotransmitter
A depolarization makes it MORE likely that an action potential will fire; a hyperpolarization makes it LESS likely that an action potential will fire.
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EPSPs and IPSPs
There are diverse variables that cause a distinction between action potential and graded potential.
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Description of an Action Potential
When the stimulation gets high enough, like at 1, then an action potential is started. The action potential is all-or-nothing. Once threshold is reached, you will get an action potential.
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Factors Affecting Action Potentials
If, after we add all of the signals together, we reach threshold, then an action potential will fire. If, after we add all of the signals together, we do not reach threshold, then an action potential will not fire.
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Action Potential and Ion Regulation
563956 Action Potential and Ion Regulation Describe the events that must occur to generate an action potential. Indicate how the ionic gates are controlled, explain why the action potential is an all-or-none phenomenon.
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period of about 1.5 ms occurs after every action potential during which time another action potential cannot be generated.
6.
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Study Question
Generates an action potential across the muscle fiber membrane. FALSE By definition a minature end plate potential is not large enough to generate an EPP (end plate potential) or action potential. It is a sub-threshold stimulation.
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What is responsible for hyperpolarization?
What is responsible for hyperpolarization in an action potential. Why is it more difficult to initiate an action potential when the membrane is hyperpolarized?
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Discussion on action potentials
For most neurons, this threshold potential is -55mV. Until a neuron is stimulated enough to reach this level, the neuron does not fire off an action potential.