At Any Given Point Along the Length of the Gill

question 50

Multiple Choice

At any given point along the length of the gill lamella, how does the pO₂ of the blood flowing through the blood vessels in the lamella compare to the pO₂of the water flowing over the gill lamella?

• A)The pO₂ of the blood is lower than the pO₂ of the water.
• B)The pO₂ of the blood is higher than the pO₂ of the water.
• C)The partial pressure of oxygen in the blood is equal to the pO₂ of the water.
• D)The pO₂ of the blood is variable and cannot be compared to the pO₂ of the water.
• E)The pO₂ of the blood never exceeds 50% of the pO₂ of the water.

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Definitions:

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