Atmosphere, Oxygen And Respiration Flashcards
What is another name for your voice box?
Larynx.
What prevent food from travelling into your wind pipes?
Pharynx.
What muscles are next to your ribs?
Inter costal muscles.
Whats the name of your normal breathing volume and what is this value?
Tidal volume (500ml).
What is the residual volume within your lungs and how much is it?
The amount of air needed to keep the lungs inflated (1200ml)
Healthy people are usually capable of compensating for a lack of oxygen up to what altitude?
10,000ft
At rest the cardiac output (the quantity of blood the heart pumps in one minute) of an adult is approximately what?
5ltrs in 1 min
What is respiration rate cause by?
CO2 levels.
When CO2 meets H2O, what happens?
Carbonic acid is made.
How does out body remove carbonic acid?
Increase respiration rates.
What is the normal amount of breaths per minute?
16 breaths per minute.
What does Ficks law describe in the lung?
Diffusion.
What is hypoxia?
Insufficient oxygen
When does hypoxic hypoxia occur?
High altitude.
What is anemic hypoxia / hynemic hypoxia?
Lack of iron in the blood.
What causes stagnast hypoxia?
Circulatory issues.
What causes histotoxic hypoxia?
Drugs/ alcohol/ smoking.
At 20,000ft, what are your haemoglobin % levels?
65%.
What is cyanosis and what does it indicate?
Skin going blue - hypoxia.
At what level can night vision be affected?
5,000ft.
At 33,700ft, blank % of blank is the same as sealevel levels.
100% oxygen.
Between what altitudes does a partial compensatory stage occur in which there is an increase in breathing rate as well as a degradation in the nervous system?
12,000 - 20,000ft.
Above 22,000ft, with out oxygen, what happens to the human body?
It becomes incapacitated.
What is the effective performance time at FL400?
15-30 seconds.
What is the effective performance time at FL350?
30-90 second.
What is the effective performance time at FL300?
1-2minutes.
What is the effective performance time at FL200?
30minutes.
What is the average PH of human blood?
7.4
What two techniques can help stop hyperventilation?
Talking loudly and breathing into a bag.
Above 40 000 ft the EPT is approximately blank seconds.
5-6
During hyperventilation the blood goes more acidic/alkaline.
Alkali
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