7222934
Descripción
Test por Alexandra Bozan, actualizado hace más de 1 año
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Creado por Alexandra Bozan
hace casi 8 años
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Pregunta 1
Pregunta
If oxygen is 21% of the atmosphere, it will contribute [blank_start]21%[blank_end] of the total atmospheric pressure.
Respuesta
-
21%
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79%
-
0.21%
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0.79%
Pregunta 2
Pregunta
The amount of oxygen that diffuses into blood each minute depends on the
Respuesta
-
total functional surface area of the respiratory membrane
-
respiratory minute volume
-
alveolar ventilation
-
all of the above
Pregunta 3
Pregunta
Po2 at standard atmosphere pressure is approximately
Respuesta
-
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
Pregunta 4
Pregunta
Anything that decreases the total functional surface are of the respiratory membrane
Respuesta
-
tends to decrease oxygen diffusion into the blood
-
tends to increase oxygen diffusion into the blood
-
has little effect on oxygen diffusion
-
increases the humidity of oxygen as it diffuses
Pregunta 5
Pregunta
Partial pressure and tension can be used interchangeably
Respuesta
- True
- False
Pregunta 6
Pregunta
The diameter of the pulmonary capillaries allows red blood cells to travel through at 10 abreast
Respuesta
- True
- False
Pregunta 7
Pregunta
Nitrogen is the gas of greatest concentration in atmospheric air
Respuesta
- True
- False
Pregunta 8
Pregunta
Oxygen is carried in blood
Respuesta
-
as oxyhemoglobin
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dissolved in plasma
-
molecularly as HbO2
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all of the above
Pregunta 9
Pregunta
Which of the following is not a manner in which CO2 is transported in the blood
Respuesta
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dissolved in plasma
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bound to the heme group of the hemoglobin
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as bicarbonate ions
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bound to the polypeptide chairs of hemoglobin
Pregunta 10
Pregunta
Increasing the carbon dioxide content of blood results in
Respuesta
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a. increased H+ concentration of plasma
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b. decreased blood pH
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c. increased blood pH
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d. both a and b
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e. both a and c
Pregunta 11
Pregunta
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].
Respuesta
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oxyhemoglobin
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plasma
-
bicarbonate ion
-
plasma
-
hemoglobin
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bicarbonate ion
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carbonic acid
Pregunta 12
Pregunta
The exact amount of oxygen in blood depends mainly upon the amount of hemoglobin present.
Respuesta
- True
- False
Pregunta 13
Pregunta
As plasma Pco2 increases, the CO2 carrying capacity of blood decreases
Respuesta
- True
- False
Pregunta 14
Pregunta
Interstitial fluid PO2 and intracellular fluid PO2 are essentially the same
Respuesta
- True
- False
Pregunta 15
Pregunta
A right shift of the oxygen-hemoglobin dissociation curve due to increased PCO2 is known as the Bohr effect
Respuesta
- True
- False
Pregunta 16
Pregunta
Carbaminohemoglobin is formed when [blank_start]carbon dioxide[blank_end] binds to hemoglobin.
Respuesta
-
carbon dioxide
-
oxygen
-
amino acids
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nitrogen
Pregunta 17
Pregunta
Most of the oxygen transported by the blood is
Respuesta
-
dissolved to white blood cells
-
bound to white blood cells
-
bound to hemoglobin
-
bound to cabaminohemoglobin
Pregunta 18
Pregunta
The increased total CO2 loading caused by a decrease in PO2 is a phenomenon knows as the
Respuesta
-
Haldane effect
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Bohr effect
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Boyle effect
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Dalton effect
Pregunta 19
Pregunta
Fick's law
Respuesta
-
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
Pregunta 20
Pregunta
Which of the following is true regarding the diffusion of oxygen from the alveolar air into the blood in lung capillaries?
Respuesta
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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
Pregunta 21
Pregunta
Gases
Respuesta
-
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
Pregunta 22
Pregunta
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].
Respuesta
-
plasma
-
hemoglobin
Pregunta 23
Pregunta
The compound formed when carbon dioxide combines with hemoglobin is [blank_start]carbaminohemoglobin[blank_end].
Respuesta
-
carbaminohemoglobin
Pregunta 24
Pregunta
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].
Respuesta
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carbonic
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acid
Pregunta 25
Pregunta
[blank_start]Carbon[blank_end] [blank_start]monoxide[blank_end] binds to hemoglobin more than 200 times more strongly than oxygen.
Respuesta
-
Carbon
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monoxide
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