Question

Almost same $pC{O}_2$ in humans is found in:

• A. Oxygenated blood and tissues
• B. Deoxygenated blood and oxygenated blood
• C. Deoxygenated blood and tissues
• D. All of the above

Answer 1

The correct option is C Deoxygenated blood and tissues

Gas exchange during respiration occurs primarily through diffusion. Diffusion is a process in which transport is driven by a concentration gradient or difference in partial pressure. Gas molecules move from a region of high concentration to a region of low concentration or from a region of high partial pressure to a region of low partial pressure.

Deoxygenated blood and tissues both have the same partial pressure $C{O}_2$.