Aviation Physiology Flashcards
Why does the AIM say to use oxygen, if avilable, from the ground up at night?
Because hypoxia reduces night vision
What is disbarism?
Gasses trapped in our body (ear or eye or teeth) that expand or contract, causing pain.
The most likely time for this to be a problem is during descent (ears popping)
What is Time of Useful Consciousness?
How much time do you have with depressurization at various altitudes?
20,000ft - 5-12 minutes
50,000ft - 12 seconds or less
Why do G forces make you pass out?
In positive G maneuvers, it pulls all your blood towards your feet and away from your brain
At what altitude may some people notice an increase in heart rate and breathing speed due to beginnings of hypoxic hypoxia?
8000ft ASL
What is Hypoxic Hypoxia?
Low oxygen levels in the blood
What is Ischaemic Hypoxia?
An inadequate supply of blood to body tissues (usually from G force maneauvers)
What is Histotoic Hypoxia?
An inability of the cells of the body to use the oxygen available.
Rare in pilots, usually a result of drug use, chemical poisoning, alcohol, etc
What is empty-field myopia?
- A condition in which the eyes have nothing specific to focus on
- Occures in featurless sky/landscapes (snow covered or desert surfaces, large bodies of water, etc)
- Your eyes will just fix on a point a few feet away and this could cause you to miss spotting oncoming aircraft
How long does it take the body to metabolize one ounce of alcohol?
3 hours
How long into your pregnancy can you fly?
Up to 30 weeks into your pregnancy
What weird ass thing do you need to know that being too cold for too long can cause?
Virtigo
What is the D.E.C.I.D.E. model?
Detect - detect the change
Estimate - the need to do something about it
Choose - a successful outcome
Identify - actions to control the change
Do - the identified action
Evaluate - the effect of the action on the change
