MCAT Biology Question 52: Answer and Explanation
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Question: 52
7. When the potential across the axon membrane is more negative than the normal resting potential, the neuron is said to be in a state of:
- A. depolarization.
- B. hyperpolarization.
- C. repolarization.
- D. polarization.
Correct Answer: B
Explanation:
When the potential across the axon membrane is more negative than the normal resting potential, the neuron is referred to as hyperpolarized. Hyperpolarization occurs right after an action potential and is caused by excess potassium exiting the neuron.