Question

Ion concentrations are first significantly affected after ________ action potential(s).

A. one

B. a few dozen

C. a few hundred

D. a few thousand

E. a few million

Answer 1

The correct answer is C. a few hundred. During an action potential, depolarization occurs when the membrane becomes permeable to Na+ ions, and repolarization follows as the membrane becomes impermeable to Na+ and K+ moves from high to low concentration.

Step-by-step explanation:

The correct answer is C. a few hundred. Ion concentrations are first significantly affected after a few hundred action potentials. During an action potential, depolarization occurs when the membrane becomes permeable to Na+ ions, and repolarization follows as the membrane becomes impermeable to Na+ and K+ moves from high to low concentration. cell of times without depleting the concentration differences, as active transport maintains these differences over the long term.

correct answer is C. a few hundred. During an action potential, depolarization occurs when the membrane becomes permeable to Na+ ions, and repolarization follows as the membrane becomes impermeable to Na+ and K+ moves from high to low concentration. The cell can fire hundreds of times without depleting the concentration differences, as active transport maintains these differences over the long term.