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A difference in the amount and type of ions between the two sides of a plasma membrane or a charge difference that occurs when ions move along a membrane is called an “electrical potential”. What does the term “action potential” refer to?

waelhammad
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2022-10-19
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A difference in the amount and type of ions between the two sides of a plasma membrane or a charge difference that occurs when ions move along a membrane is called an “electrical potential”. What does the term “action potential” refer to?

  1. The distribution of ions that results in the inside of the cell being at about −70 mV compared to outside the cell.
  2. A movement of sodium ions into the cell following a stimulus and the ions spreading out along the inside of the cell membrane.
  3. The rapid movement of sodium ions into the cell followed by potassium ions moving out of the cell, with the movement being repeated along the length of the neuron
  4. Sodium ions being pumped out of the cell, while potassium ions are moved into the cell.
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waelhammad
2022-10-19
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C: The infl ux of sodium ions followed by the effl ux of potassium ions describes the action potential. Choice A describes the “resting potential”. 

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