Q. The respiratory membranes facilitates the exchange of respiratory gases through diffusion. Oxygen enters the deoxygenated blood through diffusion because
A) Partial pressure of oxygen in alveolar air and capillaries is 40 mm Hg and 100 mm Hg respectively
B) Partial pressure of oxygen in alveolar air and capillaries is 100 mm Hg and 40 mm Hg respectively
C) Partial pressure of oxygen in alveolar air and capillaries is 46 mm Hg and 40 mm Hg respectively
D) Partial pressure of oxygen in alveolar air and capillaries is 40 mm Hg and 46 mm Hg respectively
Explanation
Partial pressure of oxygen in alveolar air and capillaries is 100 mm Hg and 40 mm Hg, respectively. Partial pressure of respiratory gases in-mm Hg [table] Respir atory gases | Inspired air on atmos pheric air | Alveolar air | Deoxy genated blood | Oxyge nated blood | Expired air | Tissue cells ; $\rho O_{2}$ $\rho CO_{2}$ | 158 0.3 | 100 40 | 40 45 | 95 40 | 116 32 | 40 45 [/table]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.