Chapter 11: Gas Exchange and Transport

Chapter 11: Gas Exchange and Transport

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. On what does the movement of gases between the lungs and the body tissues mainly depend?

ANS:  B

Gas movement between the lungs and tissues occurs by simple diffusion.

DIF:    Application    REF:   p. 249            OBJ:   1

2. The lowest PO₂ would normally be found in what location?

ANS:  C

The intracellular PO₂ (approximately 5 mm Hg) provides the final gradient for oxygen diffusion into the cell.

DIF:    Application    REF:   p. 249            OBJ:   1

3. The highest PCO₂ levels are found in what location?

ANS:  C

The partial pressure of carbon dioxide (PCO₂) is highest in the cells (approximately 60 mm Hg).

DIF:    Application    REF:   p. 249            OBJ:   1

4. Which of the following are true regarding the PACO₂?
5. directly proportional to whole-body carbon dioxide production
6. inversely proportional to alveolar ventilation (_A)
7. normally maintained at about 35 to 45 mm Hg

ANS:  B

PACO₂ varies directly with the body’s production of carbon dioxide (CO₂) and inversely with alveolar ventilation (_A). Under normal conditions it is maintained at about 35 to 45 mm Hg.

DIF:    Application    REF:   p. 249            OBJ:   2

5. What is the approximate normal level of carbon dioxide production (CO₂) for an adult?

ANS:  A

In a healthy individual the normal CO₂ of is about 200 ml/min.

DIF:    Recall             REF:   p. 249            OBJ:   2