In order to maintain cellular homeostasis, one abundant type of exchange pump ejects ________ ions fromthe cell and imports ________ ions.
A) potassium; calcium
B) sodium; calcium
C) potassium; sodium
D) sodium; potassium
E) calcium; sodium

Question

Quizplus · Accepted Answer

The question is asking for the ions that are ejected from and imported into the cell in order to maintain cellular homeostasis. One common exchange pump for this process is the sodium-potassium pump, which pumps out three sodium ions and pumps in two potassium ions for every ATP molecule used. Therefore, choice D - sodium and potassium - is the correct answer.

In Order to Maintain Cellular Homeostasis, One Abundant Type of Exchange