PE - gaseouse exchange

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what is gaseouse exchange
exchange of CO2 and O2 in the lungs.
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where does gaseouse exchange take place
in the alveolis
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what happens during gaseouse exchange
O2 is taken up and used in tissue respiration and CO2 is removed from the blood and expired as a waste product
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how do the gases move
they move via diffussion, from a high concentration to a low concentratio
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why does gaseouse exchange happen
due to a difference in partial pressure of gas in the lungs and blood
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what characteristiscs of the alveoli make for efficient gas exchange
constant blood supply into which gas can diffuse -- thin alveolar membrane -- large surface area -- moist lining which enables rapid solution of gas molecules -- short distance between alveolar membrane and capillary network
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name 3 effects of exercise on gaseouse exchange in the alveoli
increased capillary density -- increased blood plasma volume -- slight increase in vital capacity -- improved uptake of O2 by the muscles
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Card 2

Front

where does gaseouse exchange take place

Back

in the alveolis

Card 3

Front

what happens during gaseouse exchange

Back

Preview of the front of card 3

Card 4

Front

how do the gases move

Back

Preview of the front of card 4

Card 5

Front

why does gaseouse exchange happen

Back

Preview of the front of card 5
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