AP101 Atmosphere

Question 1

What is the approximate percentage of oxygen, nitrogen, and other gases at 18,000 feet MSL?

Answer 1

21 percent oxygen, 78 percent nitrogen, and 1 percent other gases.

Question 2

Describe atmospheric pressure and its cause?

Answer 2

The combined weight of all the atmospheric gases which is caused by gravity pulling the gas molecules earthward and thermal and solar radiation expanding the gases outward towards space.

Question 3

What are the common units used to measure atmospheric pressure?

Answer 3

Inches of mercury (inHg), Millimeters of mercury (mmHg), and pounds per square inch (psi)

Question 4

What represents the notation for the partial pressure of gases?

Answer 4

PO₂ partial pressure of oxygen, PCO₂ partial pressure of carbon dioxide, etc.

Question 5

(T/F) PO₂ increases and the percentage of oxygen decreases as the altitude increases

Answer 5

False

Question 6

Temperature lapse rate up to approximately 35,000 feet

Answer 6

2°C per 1,000 feet

Question 7

Which physiological division is the human body adapted for?

Answer 7

Physiological zone

Question 8

Boyles law

Answer 8

Explains why a balloon expands as it ascends and why a volume of air expands when trapped in a body cavity when the pressure is reduced around it

Question 9

Henry’s law

Answer 9

Explains why a soda bubbles after it’s is opened

Question 10

Dalton’s law

Answer 10

Explains how exposure to a high altitude can reduce the available oxygen

Question 11

Ideal gas law

Answer 11

Explains why the temperature increases in a cylinder that is being pressurized

Question 12

Law of gaseous diffusion

Answer 12

Explains how oxygen moves out of the lungs into the bloodstream