Army Aeromedical Study Guide Questions With Correct Answers

Army Aeromedical Knowledge for
Aviators Exam Questions With Correct
Answers

Standard |Temperature |Lapse |- |CORRECT |ANSWER✔✔--2° |per |1000 |feet



The |Efficient |Zone |- |CORRECT |ANSWER✔✔-Extending |upward |from |sea |level |to |10,000 |feet, |
the |efficient |zone |provides |aircrews |with |a |near |ideal |physiological |environment



The |Deficient |Zone |- |CORRECT |ANSWER✔✔-10,000 |- |50,000 |ft



Hypoxia |Definition |- |CORRECT |ANSWER✔✔-State |of |O2 |deficiency |in |the |blood |cells |and |
tissues |significant |enough |to |cause |impairment |of |function



Types |of |Hypoxia |- |CORRECT |ANSWER✔✔-Hypoxic

Hypemic

Histotoxic

Stagnant



Hypoxic |Hypoxia |- |CORRECT |ANSWER✔✔-there |is |not |enough |O2 |in |the |air |or |when |
decreasing |atmospheric |pressure |prevents |diffusion |of |O2 |from |the |lungs |to |the |bloodstream. |
This |is |the |kind |aviators |are |most |likely |to |experience |above |10,000 |feet. |May |begin |to |feel |
effect |over |10,0000 |feet |(i.e |high |altitude)

,Hypemic |Hypoxia |- |CORRECT |ANSWER✔✔-Reduction |in |O2 |carrying |capability |of |red |blood |
cells; |e.g. |carbon |monoxide, |blood |loss



Stagnant |Hypoxia |- |CORRECT |ANSWER✔✔-Inadequate |circulation |of |blood |cells. |Compressed |
blood |vessels |cause |not |enough |blood |to |reach |the |tissues. |Can |be |caused |by |extreme |G |
manuevers



Histotoxic |Hypoxia |- |CORRECT |ANSWER✔✔-There |exists |some |interference |with |the |use |of |O2
|by |the |body |tissues. |Metabolic |poisons |such |as |alcohol, |narcotics, |and |drugs |such |as |cyanide |


prevent |the |tissues |from |using |oxygen |delivered |to |them



Difference |between |Signs |and |Symptoms |of |Hypoxia |- |CORRECT |ANSWER✔✔-Signs |are |effects |
on |the |body |can |be |observed |by |others |and |are |therefore |considered |objective. |However, |
individuals |can |observe |or |feel |their |own |symptoms. |Since |symptoms |can |vary |from |person |to |
person, |they |are |considered |subjective



Signs |of |Hypoxia |- |CORRECT |ANSWER✔✔-Hyperventilation, |cyanosis, |mental |confusion, |poor |
judgement, |lack |of |muscle |coordination.



Symptoms |of |Hypoxia |- |CORRECT |ANSWER✔✔-Increased |breathing |rate, |Euphoria, |
Apprehension, |Belligerence, |Fatigue, |Blurred |vision, |Headache, |Tunnel |vision, |Dizziness, |
Numbness, |Hot |and |cold |flashes, |Tingling, |Denial



Tobacco |effect |on |blood |and |physiologic |altitude |- |CORRECT |ANSWER✔✔-Smoking |3 |cigarettes
|in |rapid |succession |or |20 |to |30 |cigarettes |within |24 |hours |before |a |flight |can |saturate |8 |to |10 |


percent |of |blood's |hemoglobin. |Physiological |effects |of |this |condition |include |loss |of |about |20 |
percent |of |a |smoker's |night |vision |at |sea |level |and |a |physiologic |altitude |of |5,000 |feet |at |sea |
level



Alcohol |effects |on |Blood |- |CORRECT |ANSWER✔✔-individual |who |has |consumed |1 |ounce |of |
alcohol |can |have |a |physiologic |altitude |of |2,000 |feet |sea |level. |Chronic, |excessive |alcohol |use |
can |also |impair |blood |production.

, Stages |of |Hypoxic |Hypoxia |- |CORRECT |ANSWER✔✔-Indifferent

Compensatory

Disturbance

Critical



Indifference |Stage |- |CORRECT |ANSWER✔✔-0-10,000 |feet

Decreased |night |vision |at |4,000 |feet

Crewmembers |who |fly |above |4,000 |feet |at |night |should |be |aware |that |visual |acuity |decreases |
significantly |in |this |stage |due |to |dark |conditions |and |the |development |of |mild |hypoxia. |Self-
imposed |stressors |will |increase |the |effects |of |hypoxia |at |all |altitudes



Compensatory |Stage |- |CORRECT |ANSWER✔✔-10,000 |to |15,000 |ft; |

mild |effects |begin |to |appear, |but |the |individual |can |usually |overcome |the |effects |or |
compensate |for |the |deficits. |Pulse |rate, |systolic |blood |pressure, |circulation |rate, |and |cardiac |
output |increase. |Respiration |increases |in |depth |and |sometimes |in |rate. |

Drowsiness; |poor |judgment; |impaired |coordination |and |efficiency



Disturbance |Stage |- |CORRECT |ANSWER✔✔-15,000 |to |20,000 |ft; |

most |of |the |symptoms |of |hypoxia |will |appear, |and |will |increase |in |severity |with |absolute |
altitude, |time |at |altitude, |and |rate |of |ascent. |physiological |responses |can |no |longer |
compensate |for |O2 |deficiency. |Occasionally, |crewmembers |can |become |unconscious |from |
hypoxia |without |undergoing |the |subjective |symptoms.

Impaired |flight |control, |handwriting, |speech, |vision, |intellectual |function, |and |judgment; |
decreased |coordination, |memory, |and |sensation |to |pain



Critical |Stage |- |CORRECT |ANSWER✔✔-20,000 |ft |and |above, |