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USMLE · Question #308

During phase 3 of the myocardial action potential which ion is moving the most?

The correct answer is A. K +. See the full explanation below for the reasoning.

Question

During phase 3 of the myocardial action potential which ion is moving the most?

Options

  • AK +
  • BCa +
  • CNa +
  • DCa +

How the community answered

(60 responses)
  • A
    72% (43)
  • B
    7% (4)
  • C
    5% (3)
  • D
    17% (10)

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