Gaseous Exchange Quiz

Where does gaseous exchange take place in the lungs?

• Bronchi

• Alveoli

• Diaphragm

• Trachea

How many alveoli are there within an average adult lung?

• 1 million

• 2 million

• 3 million

• 4 million

What is the process called when molecules move from an area of high concentration to an area of low concentration?

• Osmosis

• Filtration

• Active transport

• Diffusion

What surrounds the alveoli where gaseous exchange takes place?

• Lymph nodes

• Muscle fibers

• Nerve endings

• Capillaries

What is the function of the thin walls of alveoli and capillaries during gaseous exchange?

• To prevent diffusion

• To allow easy diffusion of gases

• To store gases

• To produce gases

Which gas has a lower concentration in the blood surrounding the alveoli during gaseous exchange?

• Argon

• Oxygen

• Carbon monoxide

• Nitrogen

What happens to carbon dioxide during gaseous exchange?

• It diffuses from alveoli to capillaries

• It is stored in alveoli

• It is exhaled directly

• It diffuses from capillaries to alveoli

How can we observe the results of gaseous exchange?

• By measuring lung capacity

• By comparing air we breathe in with the air we breathe out

• By monitoring heart rate

• By analyzing blood samples