38/39 High Altitude Physiology

Question 1

What is the Time of Useful Consciousness at 40,000 ft?

[FAA CAMI]

Answer 1

25 seconds while seated, 18 seconds while active

Question 2

What is the Time of Useful Consciousness at 30,000 ft?

[FAA CAMI]

Answer 2

1 minute while seated, 45 seconds while active

Question 3

What are the 4 types of Hypoxia?

[FAA CAMI]

Answer 3

Hypoxic - Partial Pressure of O2 not sufficient

Hypemic - Reduction in blood’s ability to transport O2 (Carbon Monoxide CO)

Histotoxic - Tissues can not use the O2 carried by the blood (Alcohol)

Stagnant - Circulation of blood insufficient

Question 4

What is Hyperventilation?

[FAA CAMI]

Answer 4

An imbalance of CO and O2 in the blood. Can create localized hypoxia in the brain

Question 5

What is the difference between explosive and rapid decompression?

[FAA CAMI]

Answer 5

Lung Damage

Question 6

What is the FOM policy on scuba diving?

[FOM]

Answer 6

24 hour break