Respiratory System Physiology

Question 1

Intrapleural (Pleural) Pressure

Answer 1

Pressure in the potential space between the visceral and parietal pleura
Negative at rest
Determined by interaction between lungs and chest wall

Question 2

Intrapulmonary (Alveolar) Pressure

Answer 2

Pressure measured in the lungs/alveoli
Equals atmospheric pressure at rest
Determined by changes in lung volume

Question 3

Transpulmonary Pressure

Answer 3

Difference between Alveolar and Pulmonary pressure
(Pa - Ppl)
Determines lung volume

Question 4

Total Lung Capacity

Answer 4

The volume of air contained in the lungs at maximal inspiration

Question 5

Tidal Volume

Answer 5

The volume of air that moves in and out with each breath

Question 6

Vital Capacity

Answer 6

The volume of exhaled air

Question 7

Residual Volume

Answer 7

The air remaining in the lungs after a complete and forceful expiration

Question 8

Functional Residual Capacity

Answer 8

Combination of the expiratory reserve volume PLUS residual volume; The volume at which the elastic recoil forces of the lungs and chest wall balance out

Question 9

Obstructive diseases increase ____ ?

Answer 9

RV

Question 10

Restrictive diseases decrease ____?

Answer 10

TLC