12 Questions
What is the main process by which gas exchange occurs in the respiratory system?
Simple diffusion
According to Fick’s law of diffusion, what factor affects the volume of gas diffusing across a membrane?
Thickness of the membrane
Which of the following is NOT a factor affecting gas diffusion through the respiratory membrane?
Size of the alveoli
How does an increase in membrane thickness affect the rate of diffusion through the respiratory membrane?
It decreases the rate of diffusion
What does Fick's law state about the relationship between gas diffusion and membrane surface area?
They are directly proportional
In Fick’s law of diffusion, what is the role of the pressure gradient across the respiratory membrane?
It increases gas diffusion
What happens in pulmonary oedema?
Collection of fluid in the alveoli
How does pulmonary fibrosis affect the respiratory membrane?
Increases the thickness of the respiratory membrane
Which gas diffuses more easily through the respiratory membrane?
Carbon dioxide
What does a pulmonectomy involve?
Removal of one complete diseased lung
What factor affects the rate of diffusion across the respiratory membrane?
Pressure difference between alveoli and pulmonary capillary
How is the diffusion coefficient of a gas related to its molecular weight?
Diffusion coefficient decreases with molecular weight
Test your knowledge on the structure of the respiratory membrane, gas exchange process, and factors influencing it. Learn about the alveoli, pulmonary capillaries, and the alveolar-capillary barrier in this quiz.
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