Phys Chapter 16
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18 Terms
Conduction zone
air in
Respiratory zone
gas exchange
Alveoli Type I
gas exchange
Alveoli Type II
surfactant production
Surfactant
reduces surface tension to prevent alveolar collapse
Intrapulmonary Pressure
Pressure within alveoli
Intrapulmonary Expiration
-1cmH2O
Intrapulmonary Inspiration
+1cmH2O
Intrapleural Pressure
Pressure in pleural cavity
Intrapleural Expiration
-5cmH2O
Intrapleural Inspiration
-8cmH2O
Transpulmonary Pressure
Pressure difference between intrapleural/ pulmonary
Transpulmonary Expiration
+6 cmH2O
Transpulmonary Inspiration
+7 cmH2O
Inspiration process
Diaphragm contracts (flattens), external intercostals raise rib cage → thoracic volume ↑ → intrapulmonary pressure ↓ → intrapleural pressure ↓ → air in
Expiration process
diaphragm and intercostals relax → volume ↓ → intrapulmonary/pleural pressure ↑ → air out
Dalton's Law
total pressure = sum of individual gas pressures
Henry’s Law
amount of gas dissolved ∝ partial pressure and solubility
Note 
Flashcards (45)