Question

multiple choice 1 point
which illustration represents how oxygen and carbon dioxide diffuse into and out of a cell?
extracellular fluid
cytoplasm
a
b
c

Explanation:

Oxygen and carbon dioxide are small, non - polar molecules. They move across the cell membrane by simple diffusion. Simple diffusion does not require a protein channel (as in facilitated diffusion shown in B and C). In simple diffusion, molecules move from an area of higher concentration to an area of lower concentration directly through the phospholipid bilayer.

Answer:

A.