NEET Class neet Answered
Which of the following statement is not true?
(a) The partial pressure of oxygen in deoxygenated blood is 40 mmHg.
(b) The partial pressure of oxygen in oxygentaed blood is 95 mm Hg.
(c) The partial pressure of oxygen in alveolar air is 104 mm Hg.
(d) The partial pressure of CO2 in the alveolar air is 40 mm Hg.
Kindly explain the option with solution ASAP. THANK YOU ♥
Asked by pratikshyadashrkl | 13 Jul, 2019, 10:36: AM
Expert Answer
- The partial pressure of carbon dioxide in the blood of the capillary is about 45 mm Hg, whereas its partial pressure in the alveoli is about 40 mm Hg. However, the solubility of carbon dioxide is much greater than that of oxygen in both blood and alveolar fluids. As a result, the relative concentrations of oxygen and carbon dioxide that diffuse across the respiratory membrane are similar.
- The partial pressure of oxygen in alveolar air is about 104 mm Hg, whereas the partial pressure of the oxygenated pulmonary venous blood is about 100 mm Hg. When ventilation is sufficient, oxygen enters the alveoli at a high rate, and the partial pressure of oxygen in the alveoli remains high.
- Thus, from the options given to us, option A, is incorrect.
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