Question

Carbon dioxide produced by cells as a by-product of the Krebs cycle crosses the plasma membrane...

Carbon dioxide produced by cells as a by-product of the Krebs cycle crosses the plasma membrane of cells by

A. simple diffusion

B. anion exchange

C. active transport

D. facilitated diffusion

I got stuck on this question and never knew what it was. My best guess to it was simple diffusion, but I was not confident in my answer

Science   Anatomy-And-Physiology   
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Answer #1

Answer: A. simple diffusion

Explanation : Gases such as oxygen and carbon dioxide cross the plasma membrane / cell membrane by the process of passive diffusion through the lipid bilayer because Gases are uncharged substances and very lipid soluble in nature and readily pass through the lipid bilayer ( hydrophobic in nature ) They diffuse down their concentration gradient ( higher concentration to lower concentration of gas )  by passive transport... Thanks dear student

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