Question

Gases like carbon dioxide and oxygen move across the cell membrane using? a. lon channels b. Facilitate diffusion. c. Exocytosis d. Diffusion​

Answer 1

Answer:

Gases like carbon dioxide and oxygen move across the cell membrane using diffusion​ (option d).

Explanation:

The cell membrane is a semi-permeable barrier to the passage of substances through it, having several transport mechanisms to allow the passage of substances.

One of the transmembrane transport mechanisms is simple diffusion, by which gases from respiration —oxygen and carbon dioxide— can pass, as well as small nonpolar molecules.

Simple diffusion is a mechanism that does not require energy, but depends on a transmembrane concentration gradient.

    The other options are not correct because they involve transmembrane transport mechanisms that are not used by oxygen and carbon dioxide.

Answer 2

Answer:

d. Diffusion​

Explanation:

Oxygen and carbon dioxide move across cell membranes via simple diffusion, a process that requires no energy input and is driven by differences in concentration on either side of the cell membrane.