Respiratory Physiology Flashcards
1
Q
Respiratory Zones
A
- Respiratory Bronchioles
- Alveolar ducts
- Alveolar sacs
2
Q
Generations of airway in respiratory system
A
23 generations
3
Q
Formula for Physiologic Dead Space
A
VD = Tidal Volume x [(PCO2 arterial Blood - PCO2 of mixed expired air) /PCO2 arterial Blood]
4
Q
Amount of anatomic dead space in normal person
A
150 ml
5
Q
Amount of physiologic dead space in a normal person
A
0 ml
6
Q
Normal FEV1/FVC ratio
A
80 percent
7
Q
Surfactant production starts at what AOG?
A
24th weeks AOG
8
Q
Surfactant Maturation begins at what AOG
A
35th week AOG
9
Q
Shape of Oxygen dissociation curve
A
Sigmoidal
10
Q
O2 Hgb Dissociation Curve
Shift to the RIGHT
A
- Increased CO2
- Increased 2,3 BPG
- Acidosis (Increased Hydrogen ion)
- Exercise
- Increased temperature
11
Q
Carbon Monoxide
Shift to the LEFT or RIGHT?
A
LEFT
12
Q
Hemoglobin F
Shift to the LEFT or RIGHT?
A
LEFT
13
Q
Lung Zones
Zone I
A
•Local alveolar capillary pressure
14
Q
Lungs Zone 2
A
- Local Alveolar capillarysystolic pressure > alveolar air pressure during systole but less than that during diastole
- Intermittent blood flow
15
Q
Lung Zone 3
A
- Local alveolar capillary pressure > alveolar air pressure throughout the cycle
- Continuous blood flow
