The Main Phenomenon That Increases the Efficiency of Gas Exchange

question 34

Multiple Choice

The main phenomenon that increases the efficiency of gas exchange in fish gills is the

• A)countercurrent exchange mechanism.
• B)co-current exchange mechanism.
• C)high degree of oxygen saturation of water.
• D)back-and-forth movement of water that maximizes oxygen uptake.
• E)very high blood pressure found in the circulatory system of fishes.

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A political party active in the mid-19th century in the United States that opposed the policies of the Democratic Party and advocated for modernization and economic protectionism.

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