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28 Cards in this Set
- Front
- Back
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What are the three gases we are concerned with for this class?
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oxygen, nitrogen and carbon dioxide
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Boyle's Law - the volume of gas varies _______ with it's pressure
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inversely
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Charles' Law - the volume of gas varies directly with it's _________
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temperature
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What percent of nitrogen makes up the atmosphere?
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78%
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Carbon dioxide makes up 3% of the atmosphere (true/false)
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false
it makes up 21% |
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Oxygen makes up ____% of the atmosphere.
a) 78% b) 3% c) 21% |
c) 21%
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Gaseous diffusion is the movement of molecules from _________ concentrations to the areas of _______ concentrations
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higher to lower
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Do all gases exert a pressure?
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yes, all gases exert a pressure
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Gas pressure in a liquid is called ________.
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tension
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How is atmospheric pressure measured?
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with a barometer
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What component of the red blood cell carries oxygen?
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the hemoglobin
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Oxygen is the most abundant gas in the atmosphere (true/false)
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false
Nitrogen is the most abundant |
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What gas in the atmosphere do humans need to sustain life?
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oxygen
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What are "trace gases"?
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The small percent of gases that make up the remainder of the earth's atmosphere
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Carbon dioxide is a by or waste product of human metabolism (true/false)
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true
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1 ATM is the same as saying _______
(list all four terms) |
TORR or mmHg
inHg mmHg PSI |
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What is the atmospheric pressure at sea level?
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760 mmHg (or TORR)
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What metal is used in barometers?
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mercury
but sometimes water is used because mercury is not a substance humans often come into contact with |
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How does the atmospheric pressure at altitudes below sea level compare with atmospheric pressure at sea level?
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The atmospheric pressure below sea level is higher
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If the atmospheric pressure on Mt. Everest is one-third the atmospheric pressure at sea level, the partial pressure of oxygen on Everest is?
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one third the pressure at sea level
.21x 760 mmHg = 160mmHg (the percent of gas present multiplied by the atmospheric pressure at sea level) 1/3 of 160 mmHg = 53 mmHg (the amount you want to know - partial pressure of oxygen) |
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"A" stands for what?
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atmospheric gas
what we initially breathe in |
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"a" stand for ________ gas
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arterial
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The partial pressure for atmospheric oxygen may also be written ________
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PAO2
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PaO2 is the partial pressure of ________ gas
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arterial
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How can you tell the difference between the "a" and the "A"?
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The little "a" is for arterial and is a smaller word than atmospheric which is represented by a big "A"
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When does PAO2 become PaO2?
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after it diffuses across the alveolar capillary membrane.
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What is the normal pH for blood? (found in ABG)
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7.35-7.45
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What is the normal level for PaO2 in the blood? (found in ABG)
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35-45 mmHg
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