Neuron action potentials: The creation of a brain signal - Khan …
https://www.khanacademy.org/test-prep/mcat/organ-systems/neuron-membrane-potentials/a/neuron-action-potentials-the-creation-of-a-brain-signal
OverviewConcentration gradientsResting membrane potentialHow action potentials workRefractory PeriodsAction potentials work on an all-or-none basis. This means that an action potential is either trigg…When the brain gets really excited, it fires off a lot of signals. How quickly these signals fire tells us how strong the original stimulus is - the stronger the signal, the higher the frequency of action potentials. There is a maximum frequency at which a single neuron can send action potentials, …•Absolute refractory period: during this time it is absolutely impossible to send another action po…•Relative refractory period: during this time, it is really hard to send an action potential. This is the period after the absolute refractory period, when the h gates are open again. However, the cell is still h Action potentials work on an all-or-none basis. This means that an action potential is either trigg…When the brain gets really excited, it fires off a lot of signals. How quickly these signals fire tells us how strong the original stimulus is - the stronger the signal, the higher the frequency of action potentials. There is a maximum frequency at which a single neuron can send action potentials, … •Absolute refractory period: during this time it is absolutely impossible to send another action po…•Relative refractory period: during this time, it is really hard to send an action potential. This is the period after the absolute refractory period, when the h gates are open again. However, the cell is still hyperpolarized after sending an action potential. It would take even more positive ions than …
Action potentials work on an all-or-none basis. This means that an action potential is either trigg…When the brain gets really excited, it fires off a lot of signals. How quickly these signals fire tells us how strong the original stimulus is - the stronger the signal, the higher the frequency of action potentials. There is a maximum frequency at which a single neuron can send action potentials, …
•Absolute refractory period: during this time it is absolutely impossible to send another action po…•Relative refractory period: during this time, it is really hard to send an action potential. This is the period after the absolute refractory period, when the h gates are open again. However, the cell is still hyperpolarized after sending an action potential. It would take even more positive ions than …
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