28 Overview of Respiratory Function Flashcards
Equation for compliance?
Compliance= Delta V/ Delta P
O2 is most important for regulating ___
CO2 is most important for regulating____
- Heart circulation, peripheral (emergency) pulmonary chemoreceptors
- Brain circulation, central pulmonary chemoreceptors
Pulmonary drive has what 3 components?
- Pattern generator
- Integrator
- Motor output
What is normal PaCO2?
40 mmHg. Maintained very powerfully.
Pulmonary diseases usually affect drive, bellows, or diffusion?
Bellows (even abdominal distension!)
Pulmonary Function Testing tests drive, bellows, or diffusion? Another name for this testing is what?
- Bellows (Resistance and Compliance)
- Spirometry
Equation for resistance?
R= Delta P/Flow (Think electrical V=I*R)
Asthma is what kind of pulmonary problem?
high resistance
Emphysema is what kind of pulmonary problem?
High compliance (air is not forced out of lungs) and somewhat high resistance
Fibrosis and pulmonary edema are what kind of pulmonary problem?
Low compliance (air is hard to suck into lungs)
T/F increased compliance decreases the work of breathing?
False. Since last breath doesn’t go all the way out, it is harder to suck next breath in due to 1) mechanical disadvantage and 2) Higher alveolar pressure at end-expiration “AutoPEEP”
Where in the body is O2 concentration the lowest?
Mitochondria
What is the main transport system for CO2?
Bicarbonate ion, thru chloride shift. (Cl into RBC, HCO3 out)
T/F The functional residual capacity can be expired when desired?
False. Only part of it can.
FRC is?
Functional Residual Capacity
