Atmospheric pressure at sea level is equal to a column of 760 mm Hg.
Oxygen makes up 21% of the atmosphere by volume.
If the partial pressure of CO2?at sea level is approximately 0.23 mm Hg, how does this influence gas exchange in terrestrial animals?
|the higher pressure of oxygen causes the lung surface to extract oxygen and give up carbon dioxide|
|the low concentration of carbon dioxide causes the carbon dioxide to exert pressure on the inner lung surface|
|the low concentration of carbon dioxide causes the oxygen to move across the lung surface|
|since the concentration of oxygen is lower in water, the moist surface of the lung extracts less carbon dioxide|
|the lower pressure of oxygen causes the lung surface to extract oxygen and give up carbon dioxide|
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