22. The Respiratory System

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Oxygen is transported primarily by dissolving in the plasma.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Goblet cells secrete serous fluid into the respiratory tract.

The function of the epiglottis is to:

a. Contract muscularly to cover the laryngopharynx

b. Vibrate to produce sound

c. Trigger a cough reflex

d. Cover the glottis during swallowing

Air enters the lungs through the hollow passages known collectively as the _____, which terminate in grapelike clusters called _____. The lungs are encased in the ____ membranes.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

When the PO₂ of arterial blood drops slightly, the percent saturation of Hb drops dramatically.