Figure 12-2 the Nerve Action Potential

question 42

Multiple Choice

Figure 12-2 The Nerve Action Potential

Use Figure 12-2 to answer the following questions:
-What is occurring in the area between #2 and #3?

• A) An excitatory graded potential is occurring.
• B) Potassium ions are entering the axon and causing depolarization.
• C) Chemically gated sodium channels are open and sodium is diffusing into the axon.
• D) Sodium ions are entering the axon and causing depolarization.
• E) Repolarization of the axon due to sodium ions leaving the axon is occurring.

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