Physics Ch 11 Grp 2

Front 1

4 gases normally contained in the alveoli:

Back 1

Carbon dioxide, oxygen, water vapor, nitrogen

Front 2

PAN2:

Back 2

Alveolar nitrogen pressure:

Front 3

PAN2:
(formula):

Back 3

PAN2= PB - (PAO2 + PACO2 + PH2O)

Front 4

Breathing room air at sea level, during hyperventilation, a PAO2 > ___ to ___ mmHg:
would be ________:

Back 4

120-130 would be abnormal

Front 5

The barrier to gaseous diffusion in the lung is the:

Back 5

Alveolar- capillary membrane

Front 6

The A-C membrane consists of:
(The 3* barriers to gaseous diffusion)

Back 6

1.Alveolar epithelium (alveolar membrane)
2. Interstitial space.
3. Capillary endothelium (capillary membrane)
* and sometimes the erythrocyte membrane

Front 7

The bulk of movement of a gas through a biological membrane is described by Fick's 1st law of diffusion:

Back 7

Vgas = (A x D) / T x (P1 - P2)

Front 8

Fick's law formula:
A:
D:
T:
P1 - P2:

Back 8

A. equals the cross-sectional area available for diffusion.
D: the diffusion coefficient of the gas
T: the thickness of the membrane
P1- P2: the partial pressure gradient across the membrane