V/Q Relationships - Karius

Question 1

at the apex of the lungs is there more or less intrapleural fluid?
more or less negative pressure?

Answer 1

less fluid

more negative

Question 2

are the alveoli big or small at the apex of the lungs?

base?

Answer 2

BIG

small

Question 3

what is the normal PAO2?

PACO2?

Answer 3

100 mmHg

40 mmHg

Question 4

what is the normal PaO2?

PaCO2?

Answer 4

40 mmHg

45 mmHg

Question 5

if V=0, what does this mean?

what happens to the O2 and CO2 in the alveolus and blood?

Answer 5

airway is blocked

O2 decreases, CO2 increases

Question 6

Over time when V=0 what will happen to the blood entering the pulmonary capillary?

Answer 6

alveolus will equilibrate with the venous blood and the blood leaving the alveolus will leave w/out exchanging O2 or CO2

Question 7

what will the O2 and CO2 gases look like if there is no perfusion (Q=0)?

Answer 7

alveolar O2 will increase bringing it closer to atm conditions
CO2 will decrease

Question 8

What is the problem if there is little to no perfusion?

Answer 8

very little blood will get oxygenated, essentially creating dead space and the overall PaO2 and CO2 will decrease

Question 9

describe the following in a high V/Q:
PaO2
PaCO2
pHa
Volume of blood

Answer 9

High
low
High
low

Question 10

describe the following in a low V/Q:
PaO2
PaCO2
pHa
Volume of blood

Answer 10

Low
High
Low
High

Question 11

what does ACE inactivate?

what is a side effect?

Answer 11

bradykinin

cough