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Respiratory_Physiology_Study_Questions - Respiratory...

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Respiratory Physiology Study Questions (select the single BEST answer) 1. Which of the following tends to cause collapse of the alveoli? A) the transpulmonary pressure (the across the lung wall pressure gradient) B) the surface tension of the fluid lining the alveoli C) both A and B D) neither A nor B 2. The lung __________ when air enters the pleural cavity (space between the two layers of the pleura). A) expands B) collapses 3. Surfactant ________ surface tension of the fluid lining the alveoli and __________ lung compliance. A) increases, increases B) decreases, decreases C) decreases, increases D) increases, decreases 4. In obstructive lung disease and asthma A) airway resistance is increased compared to normal B) a greater pressure gradient (difference between atmospheric and alveolar pressures) is needed to ventilate the lungs C) both A and B D) neither A nor B 5. In normal, quiet breathing, expiration occurs when _______________ and alveolar pressure becomes _________than atmospheric pressure. Expiration occurs until alveolar pressure _________ atmospheric pressure. A) expiratory muscles contract, greater, equals B) expiratory muscles contract, greater, becomes less than C) tissues recoil, less, becomes greater than D) tissues recoil, greater, equals Matching Questions _____6. Maximum amount of air that can be moved in and out of the respiratory system voluntarily (= inspiratory reserve volume + expiratory reserve volume + tidal volume) _____7. Volume of air that remains in the respiratory system after maximal exhalation (cannot be exhaled) _____8. Volume of air that moves in a single inspiration or expiration (in normal, quiet breathing = 500 ml) _____9. Amount of air that can be exhaled after the end of a normal expiration (by forced expiration, about 1500 ml) ____10. Vital capacity + residual volume Matching Choices A. residual volume B. expiratory reserve volume C. total lung capacity D. tidal volume E. vital capacity F. functional residual capacity G. inspiratory reserve volume 11. In which of the following is PO 2 highest? A) blood entering the lungs B) cells of the foot C) blood leaving the capillaries of the foot D) blood in the pulmonary veins E) blood in the pulmonary artery 12. Which of the following is NOT true about hemoglobin? A) one hemoglobin molecule can bind four O 2 molecules B) most of the O 2 in the blood is carried bound to hemoglobin C) hemoglobin can bind CO (carbon monoxide) D) hemoglobin can bind H + E) hemoglobin greatly increases the PO 2 of the blood 1
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13. In which region of the Oxygen-Hemoglobin Dissociation Curve does a relatively small drop in PO 2 cause a relatively large amount of oxygen to be released from hemoglobin? (Hint: this part includes the PO
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Respiratory_Physiology_Study_Questions - Respiratory...

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