Refer to the Diagram Below of a Countercurrent Exchanger from a Fish

question 47

Multiple Choice

Refer to the diagram below of a countercurrent exchanger from a fish gill. The values represent percent saturation of O₂. Based on this information alone, which of the following statements is true?

• A) Tube AB represents the flow of water and tube CD represents the flow of blood.
• B) Tube CD represents the flow of water and tube AB represents the flow of blood.
• C) The fluid in tube AB flows from A to B.
• D) The fluid in tube CD flows from D to C.
• E) Both a and c

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Definitions:

Celebrating

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