Atmospheric Environment and Respiration Flashcards
Approx. proportion of oxygen in atmosphere?
20%
Approx. proportion of nitrogen in atmosphere?
78%
What law describes the pressure of atmosphere gases being the same as the pressure of the atmosphere?
Dalton’s Law
What does Dalton’s Law relate to?
Pressure of atmosphere
What does Henry’s Law relate to?
Amount of dissolved in liquid proportional to gas pressure outside of liquid
What law describes amount of dissolved in liquid proportional to gas pressure outside of liquid?
Henry’s Law
What triggers a change in the breathing rate?
Amount of CO2 in the blood
The amount of CO2 in the blood causes what major respiratory change?
Change in breathing rate
Alveoli operation relates to what Law?
Dalton’s Law
What causes gas transfers in the alveoli?
Pressure differentials
What effect does altitude have on gas transfers (oxygen and CO2 in alveoli)?
It reduces the pressure differentials so the gas transfer is not as effective
What condition is caused by the body not receiving enough oxygen?
Hypoxia
What is cyanosis?
Blueness of the skin
Blueness of the skin is called?
Cyanosis
Cyanosis can be caused by what?
Hypoxia
Available time of useful consciousness at 20,000ft?
5-12 min
Available time of useful consciousness at 25,000ft?
2-3 min
Available time of useful consciousness at 30,000ft?
45-75 seconds
Available time of useful consciousness of 5-12 min is at what altitude?
20,000ft
Available time of useful consciousness of 2-3 min is at what altitude?
25,000ft
Available time of useful consciousness of 45-75 seconds is at what altitude?
30,000ft
What results from hyperventilation?
Upsets balance of gases in the blood
How can you determine whether symptoms are of hypoxia or hyperventilation?
Altitude
At approx. what altitude does barotrauma/DCS begin to occur?
18,000ft
AV. breaths per minute?
12-15
