Respiratory Physiology III

Question 1

Boyle’s Law

Answer 1

P1V1 = P2V2

At a given temperature, the product of pressure and volume for a gas is constant

Question 2

Dalton’s Law of Partial Pressure

Answer 2

Px = Pb x F
The partial pressure of a gas in a mixture of gases is the total pressure multiplied by the fractional concentration of gas

Question 3

Henry’s Law for Concentration of Dissolved Gases

Answer 3

Cx = Px * solubility

The concentration of a dissolved gas is related to its partial pressure and solubility

Question 4

Fick’s Law of Diffusion of Gases

Answer 4

• Transfer of gases across cell membranes or capillary walls occurs by simple diffusion
• Basically says if increased membrane thickness, decreased gas exchange

Question 5

Ideal Gas Law

Answer 5

PV = nRT

Question 6

Forms of gas in circulation

Answer 6

Dissolved gas
Bound gas
Chemically modified gas

Question 7

Order of mixed venous blood

Answer 7

tissue - veins- caudal vena cava - right atrium - right ventricle - pulmonary artery - pulmonary capillaries

Question 8

Order of systemic arterial blood

Answer 8

pulmonary venules - pulmonary veins - left atrium - left ventricle - aorta - peripheral tissues

Question 9

Diffusion-limited gas exchange

Answer 9

Total amount of gas transported across the alveolar-capillary barrier is limited by the diffusion process

Question 10

Perfusion-limited as exchange

Answer 10

Total amount of gas transported across the alveolar-capillary barrier is limited by blood flow