NAUI Nitrox Diver
40 The Physiology of Diving and Nitrox
CHAPTER 3: THE PHYSIOLOGY OF DIVING AND NITROX - KNOWLEDGE REVIEW
1. _____________________________ is a stuporous condition characterized by impaired mental and
physical performance and changes in mood and behavior.
2. The mechanisms of nitrogen narcosis are thought to be similar to ____________________________
__________________________________________.
3. This absorption and elimination of nitrogen during a dive are termed _______________________and
_______________________________.
4. The signs and symptoms of decompression sickness vary greatly and can range from ________________
_____________________________________________________ to
_____________________________________________________________________,
_____________________________________________________________________,
_____________________________________________________________________,
_____________________________________________________________________,
_____________________________________________________________________,
___________________________________________________________________, and
_____________________________________________________________________.
5. The primary waste product in metabolism is ________________________________________.
6. Symptoms of hypoxia begin to appear if the partial pressure of inspired oxygen falls below about ________
_______________.
7. Central nervous system oxygen toxicity can result from _________________________________ to
___________________________ partial pressures of oxygen. Pulmonary oxygen toxicity results from
_____________________________ to _____________________ partial pressures of oxygen.
8. For recreational nitrox diving, the generally accepted PO2 exposure limit is _____________________,
with ______________________ reserved for contingencies.
9. Among the many factors that can increase your susceptibility to CNS oxygen toxicity are ______________
_____________________, __________________________________,
___________________________________, and _______________________________.
10. The mnemonic acronym “ConVENTID” (for remembering the most obvious signs and symptoms of CNS
oxygen toxicity) stands for:
Con ____________________,
V______________________,
E______________________,
N______________________,
T______________________,
I_______________________,and
D______________________.