Structure Function Physio-Scharf Flashcards
1
Q
Fick’s first law of diffusion
A
V(dot-gas) is proportional to A*D(P1-P2)/T
2
Q
How does gas flow in the conducting zone?
A
Bulk flow with lung expansion
3
Q
How does gas move in the respiratory zone?
A
By Brownian motion/Diffusion between alveoli and capillaries.
4
Q
How does flow relate to cross sectional area?
A
Flow=volume/time, velocity=flow/cross sectinoal area.
5
Q
What is the partial pressure of water at 37C?
A
47mmHg
6
Q
What is the dry gas pressure in the body?
A
713 mm Hg
7
Q
What is the PO2 in alveoli (PAO2)?
A
.21x713=149mmHg
8
Q
Henry’s law for dissolved gases
A
Content of gas in liquid=k*Pgas (Partial Pressure of gas k(oxygen)=.003)
9
Q
Boyle’s law for constant temperature
A
P1V1=P2V2
