Quiz: Gas Exchange in Fish and Counter-Current Flow
AQA 7402 A-Level Biology
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Building on what you've learned about gas exchange, let's focus on fish and the counter-current flow system!
What structure in fish is responsible for gas exchange?
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Which of the following statements about counter-current flow in fish are correct? (Select all that apply)
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In fish, oxygen diffuses from water into the {{blank0}} of the gills, where it enters the {{blank1}}.
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Match the items on the left with their correct pairs on the right
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Why is counter-current flow more efficient than parallel flow?
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If water entering the gills has 10% oxygen and water leaving has 2% oxygen, what is the percentage of oxygen absorbed?
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Match the items on the left with their correct pairs on the right
Which features of fish gills adapt them for efficient gas exchange? (Select all that apply)
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What is the main purpose of counter-current flow in fish?
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