3475796
Question 1
Question
All of the following are true except
Answer
-
Minute Ventilation = f(tidal volume)
-
Alveolar Ventilation = f(tidal volume-dead space)
-
dead space ventilation + alveolar ventilation = Tidal volume
-
dead space = convert patient's weight in kgs to ml
Question 2
Question
A 32 yr old male has been running on a treadmill for 15 min. What are the most likely changes in the values below compared to rest?
Answer
-
CO2 Production (VCO2) increases
-
Alveolar Ventilation increased
-
PACO2 doesn't change
-
all of the above are correct
Question 3
Question
The amount of CO2 produced per minute is <= to the amount of oxygen consumed
Answer
- True
- False
Question 4
Question
RQ (Respiratory Quotient) = ratio of METABOLIC production of CO2 to O2 consumption Whereas Respiratory gas exchange ration R = CO2 production/O2 consumed at the lung
Answer
- True
- False
Question 5
Question
Which of the following statement is false
Answer
-
Hyperventilation means that alveolar ventilation exceeds CO2 production
-
Hypoventilation means that alveolar ventilation is less than CO2 production
-
During exercise hyperventilation is normal
-
all statements are true
Question 6
Question
When CO2 production doubles the alveolar ventilation doubles
Answer
- True
- False
Question 7
Question
The STPD volumes are about 20% smaller than BTPS. (because water vapor and increased temperature increase the volume of the gas)
Answer
- True
- False
Question 8
Question
Dalton's law of Partial pressures
Answer
-
The total pressure of a mixed gas is the sum of the individual partial pressures of each gas
-
in air FiO2 never changes but the barometric pressure does change based on the sea level
-
PB = PO2 + PCO2 + Pwv + PN2
-
PO2 at sea level = 160 mmHg
-
All of the above are true
Question 9
Question
Regarding PO2
Answer
-
In ambient air is 160 mmHg
-
In bronchioles it is 150 mmHg (because water vapor was added about 10 mmHg so that is subtracted
-
Alveoli it is 100 mmHg because O2 is diffusing into the blood
-
all of the above are true
Question 10
Question
Regarding Dead space all of the following are true except?
Answer
-
Humidifies air
-
Warms inspired air
-
removes particulate matter
-
gas exchange
Question 11
Question
Increase in Physiologic dead space
Answer
-
PaO2 decreased
-
PaCO2 increased
-
P expired CO2 decreased
-
P expired O2 increased
-
All of the above are correct
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