Question

question 14 of 25
to maintain stable internal conditions, cells must get rid of waste. which statement best describes the role of the cell membrane in removing waste?
a. carbon dioxide molecules pass freely through the cell membrane to exit the cell by diffusion.
b. oxygen molecules move through a layer of phospholipids to exit the cell.
c. the cell membrane surrounds waste material outside the cell, forming a vesicle that the cell ingests.
d. active transport is used to force more sugar molecules into the cell through protein pumps in order to clear the waste.

Explanation:

Cell membranes allow small, non - polar molecules like carbon dioxide to diffuse out of the cell to remove waste. Oxygen is taken in, not a waste - removal process here. Option C describes endocytosis (ingesting), not waste removal. Option D is about bringing sugar in, not waste removal.

Answer:

A. Carbon dioxide molecules pass freely through the cell membrane to exit the cell by diffusion.