Which Statement About Gas Exchange in Fish Is True

question 82

Multiple Choice

Which statement about gas exchange in fish is true?

• A) Blood flows over the gas exchange surfaces in a direction opposite to the flow of water.
• B) Gases are exchanged across the gill arches.
• C) Ventilation of the gills is tidal in fast-swimming fishes.
• D) Less work is needed to ventilate gills in warm water than in cold water.
• E) The path length for diffusion of respiratory gases is determined by the length of the gill filaments.

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