Chapter 44 Physiology of Deep-Sea Diving and Other Hyperbaric Conditions

Chapter 44  Physiology of Deep-Sea Diving and Other Hyperbaric Conditions

Complete Chapter Questions And Answers
 

Sample Questions

1. A diver is breathing 21% O2 while suspended motionless at a depth of 99 feet. What is the alveolar pO2?
A. 100 mmHg
B. 149 mmHg
C. 419 mmHg
D. 578 mmHg
E. 3,000 mmHg
D
ANS: D

2. Which of the following occurs during scuba diving?
Alveolar pO2 Alveolar pCO2 Peripheral Chemoreceptor Activity
A. ↑ ↔ ↔
B. ↔ ↔ ↔
C. ↓ ↔ ↑
D. ↓ ↓ ↓
E. ↓ ↓ ↑
F. ↔ ↓ ↑

ANS: A

3. The partial pressure of oxygen in dry air (21% O2) inhaled by divers at a depth of 100 feet below sea level (4 atmospheres) is approximately:
A. 160 mm Hg
B. 320 mm Hg
C. 640 mm Hg
D. 1,280 mm Hg

ANS: C

4. Regarding a healthy recreational scuba diver at a depth of 66 feet in the Caribbean Sea, which statement is true?
A. Her lungs are smaller than normal
B. She has an elevated arterial pO2 and a normal pCO2
C. All gas partial pressures in her blood (oxygen, nitrogen, carbon dioxide and water vapor) are elevated
D. There are increases in both fraction of inspired oxygen (FiO2) and inspired nitrogen (FiN2)

ANS: B

5. A scuba diver is diving from the surface to 100 ft. He has an increase in cardiac output from 5 to15 L/min. As he swims downward, the blood flow in the base of his lungs will be in ______ and at the apex will be at ______.
A. Zone III, zone III
B. Zone II, zone II
C. Zone I, zone III
D. Zone II, zone II

ANS: A