What is the correct sequence of events along an axon that follows a membrane reaching threshold potential?1. The membrane depolarizes.2. Sodium channels open and sodium ions diffuse inward.3. The membrane repolarizes.4. Potassium channels open and potassium ions diffuse outward.
A. 3, 2, 4, 1
B. 1, 2, 4, 3
C. 2, 1, 4, 3
D. 4, 1, 3, 2
Answer: C
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