5 Questions
What is the primary function of surface tension in the alveoli?
To resist distension
What is responsible for the surface tension in the alveoli?
The attractive forces between water molecules
What is the direction of the force exerted by surface tension in the alveoli?
Inward, raising pressure in the alveoli
What is the result of the lungs secreting and absorbing fluid?
A very thin film of fluid in the alveoli
What is the purpose of the fluid in the alveoli?
To cause surface tension
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.
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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