Question 1
Question
If oxygen is 21% of the atmosphere, it will contribute [blank_start]21%[blank_end] of the total atmospheric pressure.
Question 2
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The amount of oxygen that diffuses into blood each minute depends on the
Question 3
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Po2 at standard atmosphere pressure is approximately
Answer
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21 mm Hg
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0.2 mm Hg
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160 mm Hg
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760 mm Hg
Question 4
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Anything that decreases the total functional surface are of the respiratory membrane
Answer
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tends to decrease oxygen diffusion into the blood
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tends to increase oxygen diffusion into the blood
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has little effect on oxygen diffusion
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increases the humidity of oxygen as it diffuses
Question 5
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Partial pressure and tension can be used interchangeably
Question 6
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The diameter of the pulmonary capillaries allows red blood cells to travel through at 10 abreast
Question 7
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Nitrogen is the gas of greatest concentration in atmospheric air
Question 8
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Oxygen is carried in blood
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as oxyhemoglobin
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dissolved in plasma
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molecularly as HbO2
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all of the above
Question 9
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Which of the following is not a manner in which CO2 is transported in the blood
Question 10
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Increasing the carbon dioxide content of blood results in
Question 11
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Approximately 97% of oxygen is transported as [blank_start]oxyhemoglobin[blank_end], whereas the remaining 3% is transported dissolved in [blank_start]plasma[blank_end].
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oxyhemoglobin
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plasma
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bicarbonate ion
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plasma
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hemoglobin
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bicarbonate ion
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carbonic acid
Question 12
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The exact amount of oxygen in blood depends mainly upon the amount of hemoglobin present.
Question 13
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As plasma Pco2 increases, the CO2 carrying capacity of blood decreases
Question 14
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Interstitial fluid PO2 and intracellular fluid PO2 are essentially the same
Question 15
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A right shift of the oxygen-hemoglobin dissociation curve due to increased PCO2 is known as the Bohr effect
Question 16
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Carbaminohemoglobin is formed when [blank_start]carbon dioxide[blank_end] binds to hemoglobin.
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carbon dioxide
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oxygen
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amino acids
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nitrogen
Question 17
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Most of the oxygen transported by the blood is
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dissolved to white blood cells
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bound to white blood cells
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bound to hemoglobin
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bound to cabaminohemoglobin
Question 18
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The increased total CO2 loading caused by a decrease in PO2 is a phenomenon knows as the
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Haldane effect
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Bohr effect
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Boyle effect
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Dalton effect
Question 19
Answer
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describes the formation of oxyhemoglobin
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describes the diffusion of carbon dioxide and oxygen across the respiratory membrane
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describes the principle that states that a gas's volume is inversely proportional to its pressure
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states that volume is directly proportional to temperature when pressure is held constant
Question 20
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Which of the following is true regarding the diffusion of oxygen from the alveolar air into the blood in lung capillaries?
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the walls of the alveoli and the capillaries together form a very thin barrier for the gases to cross
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alveolar and capillary surfaces are both extremely large
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lung capillaries accommodate a large amount of blood at one time
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all of the above are true
Question 21
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move in both directions through the respiratory membrane
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cause a decrease in acidity or an increase in pH in the blood when there is an increase in carbon dioxide
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enter and leave the internal environment by osmosis
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none of the above
Question 22
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Oxygen travels in two forms: as dissolved O2 in the [blank_start]plasma[blank_end] and as O2 associated with [blank_start]hemoglobin[blank_end].
Question 23
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The compound formed when carbon dioxide combines with hemoglobin is [blank_start]carbaminohemoglobin[blank_end].
Question 24
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According to the rate of law of chemistry, as more CO2 is added to the plasma, more will be converted to [blank_start]carbonic[blank_end] [blank_start]acid[blank_end].
Question 25
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[blank_start]Carbon[blank_end] [blank_start]monoxide[blank_end] binds to hemoglobin more than 200 times more strongly than oxygen.