The respiratory membranes facilitates the exchange of respiratory gases through diffusion . Oxygen enters the deoxygenated blood through diffusion because `:-`

Options

A. Partial pressure of oxygen in alveolar air and capillaries is 40mm Hg and 100 mm Hg respectively
B. Partial pressure of oxygen in alveolar air and capillaries is 100 mm Hg and 40mm Hg respectively
C. Partial pressure of oxygen in alveolar air and capillaries is 46mm Hg and 40mm Hg respectively
D. Partial pressure of oxygen of alveolar air and capillaries it 40mm Hg and 46 mm Hg respectively

Answer

2