Figure 12-2 the Nerve Action Potential

question 21

Multiple Choice

Figure 12-2 The Nerve Action Potential

Use Figure 12-2 to answer the following questions:
-What is occurring at the area labeled #4?

• A) An inhibitory stimulus has occurred.
• B) Chemically gated potassium channels have opened.
• C) Excessive potassium has diffused out causing hyperpolarization.
• D) Sodium ions have been pumped out of the neuron.
• E) Excessive depolarization of the axon has occurred.

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