Identify the events that occurs toward the end of the repolarization phaseMultiple choice question.The Na+ activation gates close and the inactivation gates open.The Na+ activation gates open and the inactivation gates close.Both the Na+ activation and inactivation gates open.
Question
Identify the events that occurs toward the end of the repolarization phaseMultiple choice question.The Na+ activation gates close and the inactivation gates open.The Na+ activation gates open and the inactivation gates close.Both the Na+ activation and inactivation gates open.
Solution
The correct answer is "The Na+ activation gates close and the inactivation gates open." This event occurs towards the end of the repolarization phase. During this phase, the inside of the neuron is becoming more negative, moving back towards the resting potential. This is achieved by closing the sodium (Na+) activation gates, which prevents more Na+ from entering the neuron, and opening the inactivation gates, which allows K+ to exit the neuron, making the inside more negative.
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