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What are the two main ions involved in action potentials?             A) Na and K            ...

What are the two main ions involved in action potentials?

            A) Na and K

            B) Ca and I

            C) Na and Ca

            D) K and Ca

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Answer #1

  1. Option - A is correct. Na and K. For maintaining equilibrium sodium and potassium ions play an important role. The action potential is the change in the potential of the resting membrane. The main function of the Na / K pump is to maintain a concentration of Na in a low amount and K ions to be on high to maintain the resting membrane.

Option -B, Calcium ions are used in the action potential of cardiac muscles but not the iodine. So it is incorrect. Option - C, Na and Ca play a role in the action potential of different muscles of the body. Na acts on neurons and muscles while Ca is specifically for heart muscles and their combination is not possible because of their charge difference. Option - D, K and Ca also cannot work along because of their charge difference. So it is also incorrect.

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