19. Respiratory Adaptations Flashcards Preview

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Flashcards in 19. Respiratory Adaptations Deck (7)
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1
Q

What is the partial pressure of inspired O2 at room conditions?

A

149.7 mmHg

2
Q

What is the equation for PaO2, given PaCO2 at room conditions?

A

PaO2 = 149.7 mmHg (inspired O2) - PaCO2/RQ (usually .8)

3
Q

What occurs as a result of a decreased V/Q ratio?

A

O2 drops and CO2 rises

(in the blood)

4
Q

Why might we see low CACO2 levels at altitude?

A

The low oxygen tells the peripheral chemoreceptors to fire, telling you to breathe more. This results in lower CO2

5
Q

How deep do you have to go (diving in water) for the barometric pressure to increase 1 atm?

What is the barometric pressure at 30 meters?

A

10 meters

4 atm (3 + 1 for the surface pressure)

6
Q

What is the water vapor pressure at body temperature?

A

47

7
Q

What is the pressure of air at sea level?

A

760 mmHg