Which muscle is used for inspiration during both eupnea and forced breathing?

Differentiate clearly between minute ventilation and alveolar ventilation rate

Which provides a more accurate measure of ventilatory efficiency, and why?

What is the significance of

(a) Boyle's law, to the process of respiration?

When the diaphragm and external intercostal muscles contract,

(a) Exhalation occurs.

(b) Intrapulmonary pressure increases.

(c) Intrapleural pressure decreases.

(d) The volume of the lungs decreases.

(e) The size of the thoracic cavity increases.

Which of the following does not affect the efficiency of pulmonary gas exchange?

a. The surface area of the respiratory membrane

b. The degree of match of ventilation to perfusion

c. The percent saturation of hemoglobin

d. The thickness of the respiratory membrane

Which of the following statements about pulmonary ventilation is false?

a. Normal expiration requires the use of the expiratory muscles to decrease lung volume.

b. The inspiratory muscles increase lung volume, which decreases intrapulmonary pressure.

c. For inspiration to occur, intrapulmonary pressure must decrease below atmospheric pressure.

d. The intrapleural pressure is less than the intrapulmonary pressure; this prevents the lungs from collapsing during expiration.

Match each term with the correct definition. 

Airway resistance     

Surface tension     

Surfactant     

Pulmonary compliance     

V/Q ratio

a. A detergent-like chemical secreted by bronchial smooth muscle that reduces surface tension

b. The matching of ventilation to perfusion

c. Largely determined by the diameter of the airways

d. Caused by the formation of hydrogen bonds between water molecules

e. Determined by the surface tension of the alveoli, the elastic tissue of the lungs, and the condition of the chest wall