Topic 2: Gas exchange

Created by: sakiya
Created on: 23-02-19 18:00

What are the properties of a good gas exchange surface?

Large surface area, short diffusion distance, a large difference in concentration.

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What is Fick's law?

Rate of diffusion is proportional to the surface area of the gas exchange surface multiplied by the difference in concentration divided by the surface area.

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What are the properties of the gas exchange surfaces in the lungs.

The alveoli have a large surface area, there are many capillaries around the alveoli, the capillaries and alveoli have thin walls for a short diffusion distance between alveoli air and capillaries.

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What maintains the concentration gradient?

The alveoli are surrounded by capillaries at all times which maintains the concentration gradient.

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Why do large organisms require more gas exchange?

To meet metabolic rate, as there is a small surface area to volume ratio.

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Other cards in this set

Card 2

Front

What is Fick's law?

Back

Rate of diffusion is proportional to the surface area of the gas exchange surface multiplied by the difference in concentration divided by the surface area.

Card 3

Front

What are the properties of the gas exchange surfaces in the lungs.

Back

Card 4

Front

What maintains the concentration gradient?

Back

Card 5

Front

Why do large organisms require more gas exchange?

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Topic 2: Gas exchange