Respiratory System Quiz

What is the function of the conchae in the nasal cavity?

• 1. increase surface area

• exchange gases 

• maintain surface tension 

• maintain air pressure

What is the role of alveolar macrophages?

• 1. to secrete pulmonary surfactant 

• to secrete antimicrobial proteins 

• to remove pathogens and debris

• to facilitate gas exchange

The pleura that surrounds the lungs consists of two layers, the ________.

• 1. visceral and parietal pleurae.

• mediastinum and parietal pleurae. 

• visceral and mediastinum pleurae. 

• none of the above

Oxyhemoglobin forms by a chemical reaction between which of the following?

• hemoglobin and carbon dioxide

• carbonic anhydrase and carbon dioxide

• hemoglobin and oxygen

• carbonic anhydrase and oxygen

Gas flow decreases as ________ increases.

• resistance

• pressure

• airway diameter

• friction

Gas exchange that occurs at the level of the tissues is called ________.

• external respiration

• interpulmonary respiration

• internal respiration

• pulmonary ventilation

The partial pressure of carbon dioxide is 45 mm Hg in the blood and 40 mm Hg in the alveoli. What happens to the carbon dioxide?

• It diffuses into the blood.

• It diffuses into the alveoli.

• The gradient is too small for carbon dioxide to diffuse.

• It decomposes into carbon and oxygen.

A decrease in volume leads to a(n) ________ pressure.

• decrease in

• equalization of

• increase in

• zero

Contraction of the external intercostal muscles causes which of the following to occur?

• The diaphragm moves downward.

• The rib cage is compressed.

• The thoracic cavity volume decreases.

• The ribs and sternum move upward.

The pressure difference between the intra-alveolar and intrapleural pressures is called ________.

• atmospheric pressure

• pulmonary pressure

• negative pressure

• transpulmonary pressure