15. From the descriptions below, select the best description of the alveoli.
a. A smooth tube that transports the air to the lungs.
b. A piece of fibroelastic cartilage that lies under the tongue.
c. The part of the respiratory system that produces sounds.
d. Tiny, thinwalled sacs that are the site of gas transfer in the lungs.
16. From the statements below, select the statement which best describes residual
a. The extra volume of air that can be inspired over and above normal breathing.
b. The volume of air exchanged in normal breathing.
c. The volume of air contained in the lung after a forceful expiration.
d. The volume of air that can be expired forcefully.
17. From the statements below, select the statement that best describes how the
majority of oxygen is transported in the body.
a. Oxygen dissolved in the blood.
b. Oxygen transported in association with hemoglobin.
c. Oxygen transported in association with white blood cells.
d. Oxygen transported in plasma as the bicarbonate ion.