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Gas Exchange in Respiratory Membrane Quiz

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Gas Exchange in Respiratory Membrane Quiz

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Questions and Answers

What is the main process by which gas exchange occurs in the respiratory system?

Facilitated diffusion

Osmosis

Active transport

Simple diffusion (correct)

According to Fick’s law of diffusion, what factor affects the volume of gas diffusing across a membrane?

Thickness of the membrane (correct)

Blood flow rate

Temperature of the membrane

Color of the membrane

Which of the following is NOT a factor affecting gas diffusion through the respiratory membrane?

Surface area of the membrane

Pressure gradient across the membrane

Size of the alveoli (correct)

Thickness of the membrane

How does an increase in membrane thickness affect the rate of diffusion through the respiratory membrane?

It decreases the rate of diffusion Signup and view all the answers

What does Fick's law state about the relationship between gas diffusion and membrane surface area?

They are directly proportional Signup and view all the answers

In Fick’s law of diffusion, what is the role of the pressure gradient across the respiratory membrane?

It increases gas diffusion Signup and view all the answers

What happens in pulmonary oedema?

Collection of fluid in the alveoli Signup and view all the answers

How does pulmonary fibrosis affect the respiratory membrane?

Increases the thickness of the respiratory membrane Signup and view all the answers

Which gas diffuses more easily through the respiratory membrane?

Carbon dioxide Signup and view all the answers

What does a pulmonectomy involve?

Removal of one complete diseased lung Signup and view all the answers

What factor affects the rate of diffusion across the respiratory membrane?

Pressure difference between alveoli and pulmonary capillary Signup and view all the answers

How is the diffusion coefficient of a gas related to its molecular weight?

Diffusion coefficient decreases with molecular weight Signup and view all the answers