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Study Guide: Gas Exchange and Transport

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Study Guide: Gas Exchange and Transport
Alexandra Bozan
Quiz by Alexandra Bozan, updated more than 1 year ago
Alexandra Bozan
Created by Alexandra Bozan about 8 years ago
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Resource summary

Question 1

Question
If oxygen is 21% of the atmosphere, it will contribute [blank_start]21%[blank_end] of the total atmospheric pressure.
Answer
  • 21%
  • 79%
  • 0.21%
  • 0.79%

Question 2

Question
The amount of oxygen that diffuses into blood each minute depends on the
Answer
  • total functional surface area of the respiratory membrane
  • respiratory minute volume
  • alveolar ventilation
  • all of the above

Question 3

Question
Po2 at standard atmosphere pressure is approximately
Answer
  • 21 mm Hg
  • 0.2 mm Hg
  • 160 mm Hg
  • 760 mm Hg

Question 4

Question
Anything that decreases the total functional surface are of the respiratory membrane
Answer
  • 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

Question 5

Question
Partial pressure and tension can be used interchangeably
Answer
  • True
  • False

Question 6

Question
The diameter of the pulmonary capillaries allows red blood cells to travel through at 10 abreast
Answer
  • True
  • False

Question 7

Question
Nitrogen is the gas of greatest concentration in atmospheric air
Answer
  • True
  • False

Question 8

Question
Oxygen is carried in blood
Answer
  • as oxyhemoglobin
  • dissolved in plasma
  • molecularly as HbO2
  • all of the above

Question 9

Question
Which of the following is not a manner in which CO2 is transported in the blood
Answer
  • dissolved in plasma
  • bound to the heme group of the hemoglobin
  • as bicarbonate ions
  • bound to the polypeptide chairs of hemoglobin

Question 10

Question
Increasing the carbon dioxide content of blood results in
Answer
  • a. increased H+ concentration of plasma
  • b. decreased blood pH
  • c. increased blood pH
  • d. both a and b
  • e. both a and c

Question 11

Question
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].
Answer
  • oxyhemoglobin
  • plasma
  • bicarbonate ion
  • plasma
  • hemoglobin
  • bicarbonate ion
  • carbonic acid

Question 12

Question
The exact amount of oxygen in blood depends mainly upon the amount of hemoglobin present.
Answer
  • True
  • False

Question 13

Question
As plasma Pco2 increases, the CO2 carrying capacity of blood decreases
Answer
  • True
  • False

Question 14

Question
Interstitial fluid PO2 and intracellular fluid PO2 are essentially the same
Answer
  • True
  • False

Question 15

Question
A right shift of the oxygen-hemoglobin dissociation curve due to increased PCO2 is known as the Bohr effect
Answer
  • True
  • False

Question 16

Question
Carbaminohemoglobin is formed when [blank_start]carbon dioxide[blank_end] binds to hemoglobin.
Answer
  • carbon dioxide
  • oxygen
  • amino acids
  • nitrogen

Question 17

Question
Most of the oxygen transported by the blood is
Answer
  • dissolved to white blood cells
  • bound to white blood cells
  • bound to hemoglobin
  • bound to cabaminohemoglobin

Question 18

Question
The increased total CO2 loading caused by a decrease in PO2 is a phenomenon knows as the
Answer
  • Haldane effect
  • Bohr effect
  • Boyle effect
  • Dalton effect

Question 19

Question
Fick's law
Answer
  • describes the formation of oxyhemoglobin
  • describes the diffusion of carbon dioxide and oxygen across the respiratory membrane
  • describes the principle that states that a gas's volume is inversely proportional to its pressure
  • states that volume is directly proportional to temperature when pressure is held constant

Question 20

Question
Which of the following is true regarding the diffusion of oxygen from the alveolar air into the blood in lung capillaries?
Answer
  • the walls of the alveoli and the capillaries together form a very thin barrier for the gases to cross
  • alveolar and capillary surfaces are both extremely large
  • lung capillaries accommodate a large amount of blood at one time
  • all of the above are true

Question 21

Question
Gases
Answer
  • move in both directions through the respiratory membrane
  • cause a decrease in acidity or an increase in pH in the blood when there is an increase in carbon dioxide
  • enter and leave the internal environment by osmosis
  • none of the above

Question 22

Question
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].
Answer
  • plasma
  • hemoglobin

Question 23

Question
The compound formed when carbon dioxide combines with hemoglobin is [blank_start]carbaminohemoglobin[blank_end].
Answer
  • carbaminohemoglobin

Question 24

Question
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].
Answer
  • carbonic
  • acid

Question 25

Question
[blank_start]Carbon[blank_end] [blank_start]monoxide[blank_end] binds to hemoglobin more than 200 times more strongly than oxygen.
Answer
  • Carbon
  • monoxide
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