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HPNU 3060 Pulmonary Exam Questions And Accurate Answers
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HPNU 3060 Pulmonary ExamQuestions And Accurate Answers
The process by which dissolved gases are exchanged between the blood and interstitial
fluids is - Answer diffusion
Type I alveolar cells - Answer allow rapid diffusion of gases through their thin
membranes
Which of the following factors would increase the amount of oxygen released by
hemoglobin to peripheral tissues? - Answer decreased pH
Which conditions will cause the GREATEST shift rightward in this equation?
CO2+H2O<-> H2CO3<->H+ + HCO3 - Answer high pH with hypoventilation
The most important chemical regulator of respiration is - Answer carbon dioxide.
Air moves into the lungs because - Answer the gas pressure in the lungs is less than
outside pressure
The airway between the larynx and the primary bronchi is the - Answer trachea.
PaO2 is due to - Answer O2 dissolved in blood plasma
The average ventilation to perfusion ratio (V/Q) across the whole lung should fall within
which of the following ranges? - Answer .5 to 1.5
A typical value for intrapleural pressure is __________ mmHg at the beginning of
inspiration. - Answer -3
The partial pressure of oxygen in arterial blood is approximately - Answer 100 mmHg.
The distance between the alveolar air space and capillary endothelium is __________
allowing gases to diffuse __________ between them. - Answer short, rapidly
The partial pressure of carbon dioxide in arterial blood is approximately - Answer 40
mmHg.
The function of hemoglobin is to - Answer carry oxygen.
Place the following structures of the respiratory tree in the order in which air passes
through them.
1. secondary bronchi
2. bronchioles
, 3. primary bronchi
4. alveoli
5. terminal bronchioles - Answer 3, 1, 2, 5, 4
An increase in the level of carbon dioxide in the blood will - Answer increase the rate of
breathing.
Surfactant - Answer helps prevent the alveoli from collapsing.
The difference in the partial pressure of O2 in the trachea vs that in the atmosphere is
due to the - Answer partial pressure of H2O
Calculate the alveolar ventilation rate for someone with a tidal volume of 0.6 L/breath,
breathing frequency of 14 breaths/min, and dead space of 154 ml. Report your answer in
liters per minute. - Answer 6.244
Alveolar ventilation rate = breathing frequency*(tidal volume-dead space)
Functional Residual Capacity (FRC) = - Answer ERV + RV
The Hering-Breuer reflex - Answer prevents overexpansion of the lungs.
Total compliance in the tracheobronchial tree most closely resembles - Answer a circuit
in parallel
Functions of the respiratory system include
protecting respiratory surfaces from dehydration, temperature changes, or other
environmental variations.
defending the respiratory system and other tissues from pathogenic invasion.
providing an extensive area for gas exchange between air and circulating blood.
moving air to and from the exchange surface. - Answer all of these
The upper respiratory tract includes all EXCEPT which of the following? - Answer
bronchioles
In quiet breathing, - Answer inspiration involves muscular contractions and expiration is
passive.
Air entering the body is filtered, warmed, and humidified by the - Answer upper
respiratory tract.
Total resistance to air flow is lowest in - Answer alveoli
The respiratory rate times the tidal volume corrected for dead space is the - Answer
alveolar ventilation rate.
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