CHAPTER 11 EGAN'S TESTBANK QUESTIONS WITH CORRECT ANSWERS|GRADED A|100% verified|19 pages

CHAPTER 11 EGAN'S TESTBANK QUESTIONS WITH CORRECT ANSWERS|GRADED A 1. What is the primary function of the lungs? a. Convert angiotensin I to angiotensin II. b. Filter pulmonary blood. c. Gas exchange. d. Remove carbon monoxide (CO). CORRECT ANSWER Gas exchange. 2. During each cycle of normal resting ventilation, a volume of gas is moved into and out of the respiratory tract. This cyclical volume is called the: a. inspiratory reserve volume (IRV). b. vital capacity (VC). c. residual volume (RV). d. tidal volume (VT). CORRECT ANSWER tidal volume (VT). 3. Which of the following pressures vary throughout the normal breathing cycle? 1. Alveolar pressure (Palv) 2. Body surface pressure (Pbs) 3. Mouth pressure (Pao) 4. Pleural pressure (Ppl) a. 1, 2, 3, and 4 b. 2, 3, and 4 only c. 2 and 4 only d. 1 and 4 only CORRECT ANSWER 1 and 4 only 4. Which of the following pressures normally remains negative (relative to atmospheric pressure) during quiet breathing? a. Palv b. Ppl c. Pao d. Pbs CORRECT ANSWER Ppl 5. Which of the following pressure gradients is responsible for the actual flow of gas into and out of the lungs during breathing? a. Transcanadian pressure gradient (Ppc - Pks) b. Transpulmonary pressure gradient (Palv - Ppl) c. Transrespiratory pressure gradient (Palv - Pao) d. Transthoracic pressure gradient (Ppl - Pbs) CORRECT ANSWER Transrespiratory pressure gradient (Palv - Pao) 6. Which of the following pressure gradients is responsible for maintaining alveolar inflation? a. Transpulmonary pressure gradient (Palv - Ppl) b. Transthoracic pressure gradient (Ppl - Pbs) c. Transcardiac pressure gradient (Pca - Palv) d. Transrespiratory pressure gradient (Palv - Pao) CORRECT ANSWER Transpulmonary pressure gradient (Palv - Ppl) 7. Which of the following statements about alveolar pressure (Palv) during normal quiet breathing is true? a. It is positive during inspiration and negative during expiration. b. It is the same as intrapleural pressure (Ppl). c. It is negative during inspiration and positive during expiration. d. It always remains less than atmospheric pressure. CORRECT ANSWER It is negative during inspiration and positive during expiration. 8. What happens during normal inspiration? 1. The Ppl increases further below atmospheric pressure. 2. The transpulmonary pressure gradient widens. 3. Palv drops below that at the airway opening. a. 1 and 2 only b. 2 and 3 only c. 1 only d. 1 and 3 only CORRECT ANSWER 2 and 3 only 9. During normal tidal ventilation, the transpulmonary pressure gradient (Palv - Ppl) reaches its maximum value at what point in the cycle? a. Midinspiration b. End-expiration c. End-inspiration d. Mid-expiration CORRECT ANSWER End-inspiration 10. During expiration, why does gas flow out from the lungs to the atmosphere? a.