-Which Statement Best Describes the Event Indicated by the Letter

question 68

Multiple Choice

-Which statement best describes the event indicated by the letter "C" in Figure 7.1 and how that event is initiated?

• A) It is an excitatory potential that causes the relative refractory period.
• B) It is a suprathreshold graded potential resulting from the opening and closing of sodium and potassium channels.
• C) It is a hyperpolarization of the membrane due to the outward movement of potassium ions.
• D) It is a subthreshold graded potential resulting from the opening of sodium channels, closure of potassium channels, or opening of ion channels for sodium and potassium.
• E) It is a suprathreshold depolarization representing an action potential.

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