Voltage-gated sodium channels close and inactivation gates open at the end of Blank______.Multiple choice question.depolarizationrepolarization
Question
Voltage-gated sodium channels close and inactivation gates open at the end of:
- Blank______.
- A. depolarization
- B. repolarization
Solution
The correct answer is "repolarization".
Step 1: During an action potential, the initial state is the resting state where the inside of the neuron is negative compared to the outside.
Step 2: When a stimulus reaches a resting neuron, the gated ion channels on the resting neuron's membrane open suddenly and allow positively charged sodium ions to rush in. This is called depolarization.
Step 3: After the sodium channels open, they then close and the voltage-gated potassium channels open, allowing positively charged potassium ions to rush out of the neuron. This is called repolarization.
Step 4: At the end of repolarization, the sodium channels close and the inactivation
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