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What is the role of surfactant in the lungs?

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Question: What is the role of surfactant in the lungs?

Options:

  1. To transport oxygen
  2. To prevent alveolar collapse
  3. To filter dust particles
  4. To regulate blood pH

Correct Answer: To prevent alveolar collapse

Solution: 

Surfactant reduces surface tension in the alveoli, preventing their collapse and aiding in gas exchange.

What is the role of surfactant in the lungs?

Practice Questions

Q1
What is the role of surfactant in the lungs?
  1. To transport oxygen
  2. To prevent alveolar collapse
  3. To filter dust particles
  4. To regulate blood pH

Questions & Step-by-Step Solutions

What is the role of surfactant in the lungs?
  • Step 1: Understand that the lungs have tiny air sacs called alveoli.
  • Step 2: Know that alveoli need to stay open to help us breathe.
  • Step 3: Learn that surfactant is a special substance made in the lungs.
  • Step 4: Realize that surfactant reduces surface tension in the alveoli.
  • Step 5: Understand that by reducing surface tension, surfactant helps keep the alveoli from collapsing.
  • Step 6: Know that this helps with gas exchange, allowing oxygen to enter the blood and carbon dioxide to leave.
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