Diffusion of gases from the alveoli into the blood is determined by summed press

Question

Diffusion of gases from the alveoli into the blood is determined by summed pressure of a the gases fractional concentration of each individual gas concentration of each individual gas flow rates of the blood passing the alveoli partial pressures of each individual gas If atmospheric P_O2 is 100 mm Hg (5.2 mmol/L) and dissolved P_O2 is 200 mm Hg (0.3 mm/L), which direction will oxygen diffuse? from the air into the water from the water into the air there will be no net diffusion of oxygen If atmospheric P_O2 = 100 mm Hg (5.2 mmol/L) and dissolved P_O2 = 100 mm Hg (0.15 mmol/L), which direction will oxygen diffuse? from the solution into the air from the air into the solution no net diffusion of oxygen will occur

Explanation / Answer

Q3. Diffusion of gases from the alveoli into the blood is determined by partial pressure of each gas, which in turn is a product of pressure and concentration. Hence based on this information the option: partial pressure of each individual gas is correct.

Q4. Oxygen will diffuse from air into water as the partial pressure of air is more than water.

Air = 100 x 5.2

= 520

Water = 200 x .3

= 60

Q5. Oxygen will diffuse from atmosphere into water as the partial pressure of air is more than dissolved i.e. water

Atmospheric = 100 x 5.2

= 520

Dissolved = 100 x .15

= 15

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