Exchange Of Gases

Question 1

primary sites of exchange of gases

Answer 1

alveoli

Question 2

important factors that can affect rate of diffusion

Answer 2

solubility of the gases
thickness of membranes involved in diffusion

Question 3

pressure contributed by an individual gas in a mixture of gases is called

Answer 3

partial pressure

Question 4

partial pressure of oxygen is represented as

Answer 4

pO2

Question 5

partial pressure for carbon dioxide is represented as

Answer 5

pCO2

Question 6

pO2 and pCO2 in atmospheric air

Answer 6

159
0.3

Question 7

pO2 and pCO2 in alveoli

Answer 7

104
40

Question 8

pO2 and pCO2 in deoxygenated blood

Answer 8

40
45

Question 9

pO2 and pCO2 in oxygenated blood

Answer 9

95
40

Question 10

pO2 and pCO2 in tissues

Answer 10

40
45

Question 11

solubility of CO2 is how many times higher than that of O2

Answer 11

20-25

Question 12

three major layers of diffusion membrane in alveoli

Answer 12

thin squamous epithelium of alveoli
basement substance
endothelium of alveolar capillaries

Question 13

total thickness of the diffusion membrane

Answer 13

much less than a millimeter