Lab 7: Partial Pressures and Pulse Oximetry

Dalton's Law

P total=P1+P2+P3...

Henrys Law

C = kP

At sea level, normal atmospheric pressure is

760 mmHg

Percent composition of nitrogen

80%

percent composition of oxygen

20%

percent composition of CO2

0.04%

How does pressure change as you go under water?

Pressure increases, 1 atm. per 33 feet.

If you bring your favorite basketball from your house in Portland to grandmas house on top of a mountain, would the ball be overinflated or under inflated?

overinflated

Low oxygen pressure is making you feel sick because you have begun to breathe quickly to compensate for the low oxygen but now you feel sick because you've altered your acid base balance. What condition would you be in? (acidosis/alkalosis)

alkalosis

Bicarb equation

H2O + CO2 <-> H2CO3 <-> HCO3- + H+

You take a popular high-altitude drug called Diamox which alters the excretion rate of bicarbonate. Would you want to increase or decrease the bicarbonate excretion rate in order to help compensate for the alkalosis?

increase

At sea level, partial pressure of oxygen is

152 mmHg

At sea level, partial pressure of nitrogen is

608 mmHg

At sea level, partial pressure of CO2 is

0.3 mmHg