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Flight Physiology and Altitude Effects Flashcards
BCEN CFRN Flashcards
Study our Flight Physiology and Altitude Effects flashcards for the BCEN CFRN exam with 24+ flashcards. View as flashcards, a searchable table, or as a fun matching game.
| Front | Back |
| At what altitude do most people begin to experience mild hypoxia symptoms | Around 10,000 feet. |
| At what altitude do pressurization loss emergencies typically require immediate oxygen | Above 14,000 feet. |
| How can rapid decompression affect the human body | Causes gas expansion, ear pain, and potential lung damage. |
| How does altitude affect decision-making | Higher altitudes impair cognitive function due to reduced oxygen levels. |
| How does TUC change with increasing altitude | TUC decreases significantly as altitude increases. |
| What causes decompression sickness at high altitudes | Nitrogen gas coming out of solution in your blood and tissues. |
| What does the acronym TUC stand for in altitude physiology | Time of Useful Consciousness. |
| What does the term "altitude sickness" refer to | Adverse effects like headache, nausea, and dizziness due to rapid ascent to high altitudes. |
| What is Boyle's Law and its relevance to flight physiology | Gas volume is inversely proportional to pressure; explains gas expansion at altitude. |
| What is hyperventilation | Breathing faster than normal, leading to decreased carbon dioxide levels. |
| What is hypoxia | A condition where the body or a region of the body is deprived of adequate oxygen supply. |
| What is one common symptom of mild hypoxia | Impaired judgment or euphoria. |
| What is the average TUC at 25 | 000 feet without supplemental oxygen, 3 to 5 minutes. |
| What is the function of pressurization systems in aircraft | Maintain cabin pressure to reduce altitude-related physiological effects. |
| What is the most common ear issue related to altitude changes | Barotrauma or "ear block." |
| What is the oxygen saturation level at sea level under normal conditions | Approximately 98-100%. |
| What is the primary cause of hypoxic hypoxia at altitude | Reduced partial pressure of oxygen in the atmosphere. |
| What is the primary risk during rapid descent without pressure adjustment | Barotrauma or gas expansion in body cavities. |
| What is the primary treatment for hyperventilation during flight | Breathing into a paper bag or slowing breathing rate. |
| What is the safer method to prevent hypoxia during flight | Supplemental oxygen use. |
| What is the standard atmospheric pressure at sea level | 760 mmHg. |
| What mechanism prevents lung overexpansion in ascent | Controlled exhalation or coughing to equalize pressure. |
| What physiological change helps acclimatization to high altitude over time | Increased red blood cell production. |
| Which flight condition is associated with "The Bends | " Rapid decompression or ascent causing nitrogen bubble formation in tissues. |
About the Flashcards
Flashcards for the BCEN CFRN exam give you a concise way to master essential flight-physiology concepts tested on test day. Each card explains how altitude alters oxygen availability, pressure, and human performance, from the onset of mild hypoxia at 10,000 feet to cabin-pressurization emergencies above 14,000 feet.
Review key gas-law relationships, Time of Useful Consciousness tables, symptoms of decompression sickness, and corrective actions for hyperventilation or ear block. Clear definitions and quantitative figures help you memorize standards like sea-level atmospheric pressure and oxygen saturation so you can apply them quickly in BCEN CFRN scenario questions.
Topics covered in this flashcard deck:
- Hypoxia recognition
- Gas laws in flight
- Time of Useful Consciousness
- Decompression sickness
- Cabin pressurization
- Hyperventilation control