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 With Answers

Sample Questions Are Posted Below

1. A diver is breathing 21% O₂ while suspended motionless at a depth of 99 feet. What is the alveolar pO₂?
2. 100 mmHg
3. 149 mmHg
4. 419 mmHg
5. 578 mmHg
6. 3,000 mmHg

D

ANS: D

2. Which of the following occurs during scuba diving?

Alveolar pO₂               Alveolar pCO₂            Peripheral Chemoreceptor Activity

1. ↑ ↔                                ↔
2. ↔ ↔                                ↔
3. ↓ ↔                                ↑
4. ↓ ↓                                  ↓
5. ↓ ↓                                  ↑
6. ↔ ↓                                  ↑

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:
4. 160 mm Hg
5. 320 mm Hg
6. 640 mm Hg
7. 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?

1. Her lungs are smaller than normal
2. She has an elevated arterial pO₂ and a normal pCO₂
3. All gas partial pressures in her blood (oxygen, nitrogen, carbon dioxide and water vapor) are elevated
4. There are increases in both fraction of inspired oxygen (FiO₂) and inspired nitrogen (FiN₂)

ANS: B