Understanding Gaseous Exchange in the Lungs

What is the primary function of the alveoli in the lungs?

• To exchange gases between the air and blood

• To filter out dust particles

• To produce mucus

• To store oxygen for later use

How do alveoli and capillaries work together to facilitate gas exchange?

• Alveoli produce carbon dioxide for the capillaries

• Alveoli pump blood through the capillaries

• Capillaries store oxygen for the alveoli

• Capillaries provide a large surface area for gas exchange

What is the process called when a substance moves from a high concentration to a low concentration?

• Filtration

• Diffusion

• Osmosis

• Active transport

Why does oxygen diffuse into the blood from the alveoli?

• The partial pressure of oxygen is higher in the alveoli than in the blood

• The blood has a higher concentration of oxygen

• The alveoli actively transport oxygen into the blood

• The blood is warmer than the alveoli

What role does oxygenated blood play in the body?

• It cools down the body

• It enables cells to release energy from food

• It stores nutrients for future use

• It helps in the digestion of food