1. Tardigrade
  2. Question
  3. Biology
  4. The option depicting the correct partial pressures (in mm Hg) is: pO2 in alveolar air pCO2 in deoxygenated blood pO2 in oxygenated blood pCO2 in tissues A 104 40 94 45 B 94 45 104 40 C 104 40 64 40 D 104 45 94 45

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Q. The option depicting the correct partial pressures (in mm Hg) is:
$pO_{2}$ in alveolar air $pCO_{2}$ in deoxygenated blood $pO_{2}$ in oxygenated blood $pCO_{2}$ in tissues
A 104 40 94 45
B 94 45 104 40
C 104 40 64 40
D 104 45 94 45

NTA AbhyasNTA Abhyas 2020Breathing and Exchange of Gases

Solution:

Partial pressure which is the pressure contributed by a single gas alone in the mixture of gases. It is represented as pG, where G represents different gases. The table gives us the pressures of oxygen and carbon-di-oxide during the exchange of gases from alveoli to blood and blood to the tissues. Carbon-di-oxide has a higher solubility in the blood $\left(\right.20-25\left.\right)$ times than that of oxygen due to which the partial pressure of $CO_{2}$ is lower as compared to oxygen.