chapter 13

Chapter 13:

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

7.The most important chemical stimuli leading to increased rate and depth of breathing is:

a.increased hydrogen ion in the blood

b.decreased carbon dioxide in the blood

c.decreased oxygen level in the blood

d.increased blood pH

e.increased carbon dioxide in the blood

8.Oxygen binds with hemoglobin in the blood to form:

a.oxyhemoglobin

b.carbonic acid

c.bicarbonate ion

d.carbon dioxide

e.plasma

9.Which one of the following is NOT a function of the paranasal sinuses:

a.they help to moisten air

b.they produce mucus

c.they are olfactory receptors for smell

d.they act as resonance chambers for speech

e.they lighten the skull

10.Obstruction of the trachea by a piece of food can lead to:

a.hemothorax

b.pulmonary tamponade

c.aspiration pneumonia

d.pleurisy

e.pneumothorax

TRUE/FALSE.Write ‘T’ if the statement is true and ‘F’ if the statement is false.

11.The respiratory membrane is the air-blood barrier, where gases are exchanged.

12.Inflammation of the pleura is often caused by decreased secretion of pleural fluid called pleurisy.

13.Exchanges between blood and tissue cells occur in capillary beds.