Question

required information
which of the following statements about partial pressures of gases in the tissues is true?
multiple choice
p_{o2} in blood is > p_{o2} in tissues; p_{co2} in blood > p_{co2} in tissues
p_{o2} in blood > p_{o2} in tissues; p_{co2} in blood < p_{co2} in tissues
p_{o2} in blood > p_{o2} in tissues; p_{co2} in blood = p_{co2} in tissues
p_{o2} in blood < p_{o2} in tissues; p_{co2} in blood < p_{co2} in tissues
p_{o2} in blood < p_{o2} in tissues; p_{co2} in blood > p_{co2} in tissues

Explanation:

Gas exchange occurs based on partial pressure gradients. Oxygen (\(P_{O2}\)) diffuses from an area of higher partial pressure (blood) to an area of lower partial pressure (tissues). Carbon dioxide (\(P_{CO2}\)) diffuses from an area of higher partial pressure (tissues) to an area of lower partial pressure (blood).

Answer:

\(P_{O2}\) in blood > \(P_{O2}\) in tissues; \(P_{CO2}\) in blood < \(P_{CO2}\) in tissues