Which of the Following Statements Are True of Electrical Changes

question 4

Multiple Choice

Which of the following statements are true of electrical changes at the sarcolemma (Select all that apply)

• A)A polarized muscle fiber has more Na+ ions inside that outside.
• B)Depolarization is the movement of K+ ions into the cell.
• C)Repolarization is the movement of Na+ ions out of the cell.
• D)A polarized muscle fiber has a positive charge inside and a negative charge outside.
• E)Depolarization is a reversal of charges; the cell has a positive charge outside and a negative charge inside.
• F)An action potential is depolarization followed by repolarization.

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