Patton: Anatomy and Physiology, 8th Edition Chapter 27-A: Physiology of the Respiratory System Test Bank

1. The major factor that determines the movement of air into or out of the lungs is a pressure gradient. ANS: T DIF: Memorization REF: Page 824 TOP: Mechanisms of Pulmonary Ventilation 2. A primary function of the respiratory system is to supply tissue with adequate oxygen and to remove carbon dioxide. ANS: T DIF: Memorization REF: Page 824 TOP: Introduction 3. For air to remain in the lungs, the pressure in the lungs must be equal to or less than atmospheric pressure. ANS: T DIF: Memorization REF: Page 824 TOP: Mechanisms of Pulmonary Ventilation 4. Standard atmospheric pressure is usually about 760 mm Hg. ANS: T DIF: Memorization REF: Page 824 TOP: Mechanism of Pulmonary Ventilation 5. The tendency of the lungs and thorax to return to their preinspiration volume is a physical phenomenon called elastic recoil. ANS: T DIF: Memorization REF: Page 831 TOP: Expiration 6. The inspiratory capacity is equal to the sum of the tidal volume and the inspiratory reserve volume. ANS: T DIF: Memorization REF: Page 834 TOP: Pulmonary Capacities 7. The amount of air that could be forcibly expired after normal expiration is called the functional residual capacity. ANS: F DIF: Memorization REF: Page 834 TOP: Pulmonary Volumes 8. Vital capacity is the sum of inspiratory reserve volume, tidal volume, and expiratory reserve volume. ANS: T DIF: Memorization REF: Page 834 TOP: Pulmonary Capacities 9. Anatomical dead space approximates 10% of the tidal volume. ANS: F DIF: Memorization REF: Page 836 TOP: Pulmonary Capacities 10. With emphysema, the amount of dead space air increases