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Question 6

Spot the false explanation of heart valves: Which claim about their circulatory role is incorrect?

  1. They help blood continue in one direction.
  2. They add oxygen to blood passing through them.Correct answer
  3. They limit backward flow between heart regions.
  4. They respond to pressure differences across them.

Explanation

Valves open and close with pressure changes to reduce backward movement of blood. They do not add oxygen, because oxygen enters blood at respiratory exchange surfaces rather than at a valve.

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Question 6: Spot the false explanation of heart valves: Which claim… · Human Body Systems · Questena