How does the sodium-potassium pump make the interior of the cell negatively charged?
by expelling anions
by pulling in anions
by expelling more cations than are taken in
by taking in and expelling an equal number of cations

Option (3).

Explanation:

Cell membrane potential or transmembrane potential may be defined as the difference in the electric potential of the interior and exterior environment of the cell. The resting membrane potential of the neuronal cell is -70mV.

Generally, two potassium moves inside the cell and three sodium moves out of the cell by the help of sodium potassium pump. Hence, the interior of the cell become negative by expelling more cations than taken inside the cell.

Thus, the correct answer is option (3).

what is the statement?

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.