Question

Which of the following statements about action potentials is incorrect? O a) During an action potential, the efflux of Kions causes the inside of cells to become more positive (depolarized). B) When critical threshold is reached an action potential is triggered C) Voltage gated channels are required to reach critical threshold D) Sodium ions diffuse across the membrane to cause depolariza D U E)Kions continue to efflux after resting membrane is reached to cause repolarization ause

Answer 1

The incorrect statements regarding action potential are as follows:

A) During an action potential, the efflux of K+ ions causes the inside of the cell to become more positive that is depolarized. (The efflux of K+ ion causes the inside of the cell to become more negative because it decreases the positive ions inside the cell membrane and results in repolarization The depolarization is cased by the influx of the positive ion that is sodium ion that causes the membrane potential to increase from the negative resting membrane potential. )

B) K+ ions continue to efflux after resting membrane is reached to cause repolarization. (Due to the efflux of K+ ions the inside potential of the cell membrane decreases and reach to the resting membrane potential of the cell but further efflux of K+ ions after reaching the resting membrane potential it causes hyperpolarization that is the cell membrane potential becomes more negative than that of the resting membrane potential.).