Why Do Na⁺ Ions Enter the Cell When Voltage-Gated Na⁺

question 20

Multiple Choice

Why do Na⁺ ions enter the cell when voltage-gated Na⁺ channels are opened in neurons?

• A)because the Na⁺ concentration is much higher outside the cell than it is inside
• B)because the Na⁺ ions are attracted to the negatively charged interior
• C)because the Na⁺ ions are actively transported by the sodium-potassium pump into the cell
• D)both A and B
• E)both A and C

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Definitions:

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A former United States Marine Corps officer who was involved in the Iran-Contra Affair, a political scandal involving the secret sale of weapons to Iran and the diversion of funds to support Contra rebels in Nicaragua.

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A political and militant organization founded in 1964, claiming to represent the world's Palestinian people in their struggle for an independent state.