BIOLOGICAL BASES OF BEHAVIOR
NEUROTRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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potassium gates close and sodium gates open
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the Na+/K+ pump pumps sodium out of the neuron and potassium into the neuron
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potassium gates open and sodium gates close
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another action potential can be propagated
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Detailed explanation-1: -A set of voltage-gated potassium channels open, allowing potassium to rush out of the cell down its electrochemical gradient. These events rapidly decrease the membrane potential, bringing it back towards its normal resting state.
Detailed explanation-2: -What changes occur to voltage-gated Na+ and K+ channels at the peak of depolarization? Inactivation gates of voltage-gated Na+ channels close, while inactivation gates of voltage-gated K+ channels open.
Detailed explanation-3: -All the voltage-gated Sodium channels open when the membrane potential reaches around-55 mV and there’s a large influx of Sodium, causing a sharp rise in voltage.
Detailed explanation-4: -Changes in membrane potential cause this alpha helix to move in the lipid bilayer. This movement in turn results in a conformational change in the adjacent S5–S6 helices that form the channel pore and cause this pore to open or close.