Chapter 10: Ventilation

Chapter 10: Ventilation

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. What is the primary function of the lungs?

ANS:  C

The primary functions of the lungs are to supply the body with oxygen (O₂) and to remove carbon dioxide (CO₂).

DIF:    Application    REF:   p. 223            OBJ:   1

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:

ANS:  D

During each cycle, a volume of gas moves in and out of the respiratory tract. This volume, measured during either inspiration or expiration, is called the tidal volume, or V_T.

DIF:    Application    REF:   p. 224            OBJ:   1

3. Which of the following pressures vary throughout the normal breathing cycle?
4. alveolar pressure (P_alv)
5. body surface pressure (P_bs)
6. mouth pressure (P_ao)
7. pleural pressure (P_pl)

ANS:  D

Alveolar pressure (P_alv), often referred to as intrapulmonary pressure, varies during the breathing cycle. P_pl also varies during the breathing cycle.

DIF:    Application    REF:   p. 225            OBJ:   2

4. Which of the following pressures normally remains negative (relative to atmospheric pressure) during quiet breathing?

ANS:  B

Pleural pressure (P_pl) is usually negative (i.e., subatmospheric) during quiet breathing.

DIF:    Application    REF:   p. 225            OBJ:   2

5. Which of the following pressure gradients is responsible for the actual flow of gas into and out of the lungs during breathing?

ANS:  C

The transrespiratory pressure gradient causes gas to flow into and out of the alveoli during breathing.

DIF:    Application    REF:   p. 225            OBJ:   2