Surface Tension in Alveoli
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Surface Tension in Alveoli

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Questions and Answers

What is the primary function of surface tension in the alveoli?

  • To regulate blood pressure
  • To warm the air we breathe
  • To resist distension (correct)
  • To facilitate the exchange of gases
  • What is responsible for the surface tension in the alveoli?

  • The repulsive forces between water molecules
  • The surface area of the alveoli
  • The attractive forces between oxygen molecules
  • The attractive forces between water molecules (correct)
  • What is the direction of the force exerted by surface tension in the alveoli?

  • Upward, towards the trachea
  • Inward, raising pressure in the alveoli (correct)
  • Downward, towards the diaphragm
  • Outward, decreasing pressure in the alveoli
  • What is the result of the lungs secreting and absorbing fluid?

    <p>A very thin film of fluid in the alveoli</p> Signup and view all the answers

    What is the purpose of the fluid in the alveoli?

    <p>To cause surface tension</p> Signup and view all the answers

    Study Notes

    Surface Tension in the Lungs

    • Surface tension is a force exerted by fluid in the alveoli to resist distension.
    • The lungs secrete and absorb fluid, leaving a very thin film of fluid on the surface.
    • This thin film of fluid causes surface tension.
    • The surface tension is a result of attractive forces between H2O molecules at the surface.
    • These attractive forces are directed inward, which raises the pressure in the alveoli.

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    Description

    Learn about the force of surface tension in the alveoli of the lungs, how it is caused by the thin film of fluid, and its effects on pressure.

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