Gas exchange

What is partial pressure?

Pressure exerted by one gas in a mixture.

What does Dalton's law explain?

Each gas has its own partial pressure; their sum equals total pressure.

What does Henry's law explain?

How gas partial pressure and solubility affect dissolving in liquids.

Which direction do gases move?

From higher partial pressure to lower partial pressure.

Which is more soluble, O₂ or CO₂?

CO₂ is more soluble than O₂ in water due to its higher solubility coefficient.

Where does oxygen move during pulmonary gas exchange?

Oxygen moves from the alveoli to the blood in the pulmonary capillaries.

Where does carbon dioxide move during pulmonary gas exchange?

Carbon dioxide moves from the blood in the pulmonary capillaries to the alveoli

What 3 factors affect gas exchange efficiency?

Surface area, diffusion distance, and capillary perfusion.

Why does CO₂ move from blood into alveoli?

CO₂ has a higher partial pressure in pulmonary blood.

Why does oxygen move from alveoli into blood?

Oxygen has a higher partial pressure in the alveoli.