Why fast sodium channels are closed at sa node rmp?
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In the SA node, three ions are particularly important in generating the pacemaker action potential. ... At the end of repolarization, when the membrane potential is very negative (about -60 mV),ion channels open that conduct slow, inward (depolarizing) Na+ currents.
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In the SA node, three ions are particularly important in generating the pacemaker action potential. ... At the end of repolarization, when the membrane potential is very negative (about -60 mV),ion channels open that conduct slow, inward (depolarizing) Na+ currents
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