IB Exercise Physiology

The graph below represents lung volume. What is labelled X?

• A. Tidal volume

• B. Vital capacity

• C. Expiratory reserve volume

• D. Inspiratory reserve volume

Which statement(s) about the functions of the conducting airways is/are correct? I. Provide a low resistance pathway for airflow,

II. Provide a site for gaseous exchange,

III. Warm and moisten the air

• A. I and II only

• B. I and III only

• C. II and III only

• D. I, II and III

What causes an increase in ventilation?

• A. A decrease in carbon dioxide content in the blood

• B. A decrease in hydrogen ions in the blood

• C. A decrease in blood pH

• D. A decrease in blood acidity

Which are principal structures of the ventilatory system?

I. Lungs II. Heart III. Alveoli

• A. I and II only

• B. I and III only

• C. II and III only

• D. I, II and III

The diagram shows various lung volumes. Which label represents tidal volume?

• A.

• B.

• C.

• D.

What promotes passive diffusion during inspiration?

• A.

• B.

• C.

• D.

Which term is defined as the volume of air breathed in and out in one breath?

• A. Pulmonary ventilation

• B. Tidal volume

• C. Vital capacity

• D. Residual volume

What is vital capacity?

• A. Inspiratory reserve volume plus total lung capacity

• B. Total lung capacity minus residual volume

• C. Tidal volume plus inspiratory reserve volume

• D. Residual volume minus expiratory reserve volume

Which is a principal structure of the ventilatory system?

• A. Capillary

• B. Bronchiole

• C. Hemoglobin

• D. Pulmonary artery

What is residual volume?

• A. Volume of air in the lungs after maximum inhalation

• B. Inflow and outflow of air between the atmosphere and the lungs

• C. Volume of air still contained in the lungs after maximal exhalation

• D. Additional inspired air over and above tidal volume