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WeekFour Quiz

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University of Phoenix Material

Week Four Quiz

Chapter 23 Respiratory System

1. Ventilation refers to the 

a. movement of air into and out of the lungs.

b. gas exchange between the blood and the tissues.

c. transportation of oxygen and carbon dioxide in the blood.

d. gas exchange between the air in the lungs and the blood.

e. respiration at the cellular level.

2. A molecule of air enters the nose through the external nares. Which of the following is the correct pathway to the trachea? 

a. nasal cavity, larynx, pharynx, trachea

b. oral cavity, nasal cavity, larynx, pharynx, trachea

c. nasopharynx, nasal cavity, laryngopharynx, trachea

d. nasal cavity, pharynx, larynx, trachea

e. nasal cavity, trachea, larynx, pharynx

3. The trachea 

a. is located in the pleural cavity.

b. has “C” shaped cartilages that form its anterior and lateral sides.

c. is lined with keratinized squamous epithelium.

d. bifurcates to form the bronchioles.

e. collapses when not in use.

4. A person has severe damage or disease in the upper area of their right lung. Surgery is necessary. The doctor would need to remove 

a. the entire right lung.

b. the superior lobe of the right lung.

c. the apical bronchopulmonary segment of the right lung.

d. only the damaged area of the apical bronchopulmonary segment.

e. the apical, anterior, and posterior segments of the superior lobe.

5. Which of the following statements is true? 

a. As thoracic volume increases, alveolar pressure (Palv) increases.

b. In expiration, the thoracic volume increases.

c. Constriction of bronchioles assists breathing.

d. As alveolar volume increases, alveolar pressure (Palv) decreases.

e. Pressure is directly proportional to volume.

6. The volume of air available for gas exchange per minute is called the 

a. vital capacity.

b. alveolar ventilation.

c. minute respiratory volume.

d. functional residual capacity.

e. respiratory rate.

7. Arrange the following in order from highest to lowest PO2.

(1) PO2 of pulmonary veins

(2) PO2 of pulmonary artery

(3) PO2 of alveolar air 

a. 1, 2, 3

b. 2, 1, 3

c. 2, 3, 1

d. 3, 1, 2

e. 3, 2, 1

8. The chloride shift refers to the 

a. effect of chloride ions on the oxygen dissociation curve.

b. exchange of chloride ions for bicarbonate ions across the red blood cell membrane.

c. exchange of chloride ions for carbon dioxide across alveolar cell membranes.

d. effect of chloride ions on hydrogen ion diffusion from red blood cells.

e. exchange of chloride ions for hemoglobin across the RBC membrane.

9. Rhythmicity of breathing involves 

a. conscious effort and control.

b. stimulation of inspiration. Expiration is automatic.

c. integration of stimuli that start and then stop inspiration.

d. a set pattern of inspiration – expiration that is always the same.

e. regulation of stimuli that start inspiration and stop expiration.

10. A patient has severe pneumonia, which has thickened the respiratory membrane. Despite oxygen therapy, he still has rapid respirations and feels as if he is not getting enough air. This is because 

a. the oxygen increases the stimulation of the carotid and aortic bodies.

b. the oxygen stimulates the respiratory center to increase the respiratory rate.

c. his blood pH increased and stimulated an increase in his respiratory rate.

d. even though he is receiving enough oxygen, carbon dioxide and hydrogen ions accumulate in his blood and cause the respiratory rate to continue to increase.

e. oxygen cannot diffuse across the thickened membrane.