Diffusion

Question 1

Gases diffuse down what gradient

Answer 1

pressure

(not concentration)

Question 2

2 types of processes limiting movement of gases

Answer 2

diffusion-limited

perfusion-limited

Question 3

Diffusion-limited processes

Answer 3

unequal solubility in blood and blood-gas barrier

Question 4

Perfusion limited processes

Answer 4

equal solubility in blood and blood-gas barrier

Question 5

Restraint on diffusion-limited processes

Answer 5

diffusion across blood-alveolar membrane

blood-gas barrier

Question 6

Example of diffusion-limited gas

Answer 6

CO

carbon monoxide

Question 7

Perfusion-limited processes

limitation

Answer 7

blood flow through pulmonary capillaries

Question 8

Examples of perfusion-limited gases

Answer 8

O₂

N₂O

Question 9

CO used clinically

Answer 9

to determine if process is diffusion-limited

Question 10

Condition in which CO pulmonary testing may be useful

Answer 10

interstitial pneumonia

Question 11

Tx of CO poisoning

Answer 11

hyperbaric O₂ chamber

want to dissolve O₂ in blood instead of use Hb to carry it