1 Which statement accurately describes the concentration of

1) Which statement accurately describes the concentration of potassium ions in a resting neuron?

Select one:

a. The concentration of potassium ions in the cell is low because open voltage-gated potassium ion channels are open.

b. The concentration of potassium ions is greater in the interior of the cell than in the extracellular medium.

c. The concentration of potassium ions is the same in the extracellular medium as in the cell interior.

d. The concentration of potassium ions is lower in the interior of the cell than in the extracellular medium.

e. The concentration of potassium ions is high because voltage-gated potassium ion channels are open.

2)Select the best answer to correctly complete the sentence: During the process of repolarization, ___ ions flood into the ___.

Select one:

a. sodium, extracellular space

b. potassium, extracellular space

c. potassium, interior of the cell

d. potassium, sodium-potassium pump

e. sodium, interior of the cell

Solution

1.option B is correct, because concentration of potassium ions is greater in the interior of cell than the Extra cellular fluid.

2.option B is correct. Because potassium ions move to the extra cellular space during repolarization.