Alveolar Ventilation

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questions
radven
Quiz by radven, updated more than 1 year ago
radven
Created by radven about 9 years ago
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Resource summary

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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