KINE 3012 Lecture Notes - Lecture 3: Transpulmonary Pressure, Intrapleural Pressure, Alveolar Pressure

71 views1 pages

Document Summary

Pressure will drop, so more air will move in. We contract the diaphragm, it flattens, it increases the volume of the intrapleural space, then pressure goes down. When we breathe in, intrapleural pressure from 756 --> 754, thus increasing volume of alveoli and deceasing alveolar pressure causing air to go in. Misconception, we don"t suck air in, air is pushed in due to the changes in pressure, delta p. Air stops going in after alveolar pressure and atmospheric pressure are equal. Thus, when we breathe, we increase transpulmonary pressure. At the end of inspiration, the recoil == transpulmonary pressure, when they stop moving, they are always equal. Diaphragm relax, thorax becomes smaller, volume smaller, intrapleural pressure increases. Transpulmonary pressure decreases, volume of alveoli decreases, alveolar pressure increases higher than atmospheric pressure, air is pushed out of the lungs. When transpulmonary pressure > recoil strength, lungs expand causing the recoil to increase until transpulmonary pressure == recoil strength.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents