Chapter 02: Physiology of the Cardiovascular and Pulmonary Systems
Hillegass: Essentials of Cardiopulmonary Physical Therapy, 4th Edition
1. The primary function of the pulmonary system is which of the following?
a. Regulating acid–base balance and maintaining normal blood pH
b. Filtering and metabolizing toxic substances
c. Achieving temperature homeostasis through evaporative heat loss
d. Exchange of oxygen and carbon dioxide between environment, blood, and tissue
According to the author, the most important function of the pulmonary system is to exchange
oxygen and carbon dioxide between the environment, blood, and tissue.
2. The total volume of air that is inhaled or exhaled in 1 minute is termed:
a. tidal volume.
b. minute ventilation.
c. inspiratory reserve volume.
d. inspiratory capacity.
The minute ventilation represents the total volume of air that is inhaled or exhaled in 1
3. The maximum amount of air that can be inhaled after a normal tidal exhalation is termed:
a. inspiratory reserve volume.
b. expiratory reserve volume.
c. inspiratory capacity.
d. vital capacity.
The inspiratory capacity (IC) is the sum of the tidal and inspiratory reserve volumes; it is the
maximum amount of air that can be inhaled after a normal tidal exhalation.
4. Which of the following brain areas provides control for automatic breathing?
a. Medulla oblongata
c. Frontal lobe of the cerebrum
The medulla oblongata contains inspiratory neurons that produce inspiration and expiratory
neurons that are triggered with force expiration. These neurons control automatic breathing.