Alexandra Bozan
Quiz by , created more than 1 year ago

Study Guide: Gas Exchange and Transport

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Alexandra Bozan
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Study Guide: Gas Exchange and Transport

Question 1 of 25

1

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If oxygen is 21% of the atmosphere, it will contribute ( 21%, 79%, 0.21%, 0.79% ) of the total atmospheric pressure.

Explanation

Question 2 of 25

1

The amount of oxygen that diffuses into blood each minute depends on the

Select one of the following:

  • total functional surface area of the respiratory membrane

  • respiratory minute volume

  • alveolar ventilation

  • all of the above

Explanation

Question 3 of 25

1

Po2 at standard atmosphere pressure is approximately

Select one of the following:

  • 21 mm Hg

  • 0.2 mm Hg

  • 160 mm Hg

  • 760 mm Hg

Explanation

Question 4 of 25

1

Anything that decreases the total functional surface are of the respiratory membrane

Select one of the following:

  • 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

Explanation

Question 5 of 25

1

Partial pressure and tension can be used interchangeably

Select one of the following:

  • True
  • False

Explanation

Question 6 of 25

1

The diameter of the pulmonary capillaries allows red blood cells to travel through at 10 abreast

Select one of the following:

  • True
  • False

Explanation

Question 7 of 25

1

Nitrogen is the gas of greatest concentration in atmospheric air

Select one of the following:

  • True
  • False

Explanation

Question 8 of 25

1

Oxygen is carried in blood

Select one of the following:

  • as oxyhemoglobin

  • dissolved in plasma

  • molecularly as HbO2

  • all of the above

Explanation

Question 9 of 25

1

Which of the following is not a manner in which CO2 is transported in the blood

Select one of the following:

  • dissolved in plasma

  • bound to the heme group of the hemoglobin

  • as bicarbonate ions

  • bound to the polypeptide chairs of hemoglobin

Explanation

Question 10 of 25

1

Increasing the carbon dioxide content of blood results in

Select one of the following:

  • a. increased H+ concentration of plasma

  • b. decreased blood pH

  • c. increased blood pH

  • d. both a and b

  • e. both a and c

Explanation

Question 11 of 25

1

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Approximately 97% of oxygen is transported as ( oxyhemoglobin, plasma, bicarbonate ion ), whereas the remaining 3% is transported dissolved in ( plasma, hemoglobin, bicarbonate ion, carbonic acid ).

Explanation

Question 12 of 25

1

The exact amount of oxygen in blood depends mainly upon the amount of hemoglobin present.

Select one of the following:

  • True
  • False

Explanation

Question 13 of 25

1

As plasma Pco2 increases, the CO2 carrying capacity of blood decreases

Select one of the following:

  • True
  • False

Explanation

Question 14 of 25

1

Interstitial fluid PO2 and intracellular fluid PO2 are essentially the same

Select one of the following:

  • True
  • False

Explanation

Question 15 of 25

1

A right shift of the oxygen-hemoglobin dissociation curve due to increased PCO2 is known as the Bohr effect

Select one of the following:

  • True
  • False

Explanation

Question 16 of 25

1

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Carbaminohemoglobin is formed when ( carbon dioxide, oxygen, amino acids, nitrogen ) binds to hemoglobin.

Explanation

Question 17 of 25

1

Most of the oxygen transported by the blood is

Select one of the following:

  • dissolved to white blood cells

  • bound to white blood cells

  • bound to hemoglobin

  • bound to cabaminohemoglobin

Explanation

Question 18 of 25

1

The increased total CO2 loading caused by a decrease in PO2 is a phenomenon knows as the

Select one of the following:

  • Haldane effect

  • Bohr effect

  • Boyle effect

  • Dalton effect

Explanation

Question 19 of 25

1

Fick's law

Select one of the following:

  • 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

Explanation

Question 20 of 25

1

Which of the following is true regarding the diffusion of oxygen from the alveolar air into the blood in lung capillaries?

Select one of the following:

  • 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

Explanation

Question 21 of 25

1

Gases

Select one of the following:

  • 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

Explanation

Question 22 of 25

1

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Oxygen travels in two forms: as dissolved O2 in the and as O2 associated with .

Explanation

Question 23 of 25

1

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The compound formed when carbon dioxide combines with hemoglobin is .

Explanation

Question 24 of 25

1

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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 .

Explanation

Question 25 of 25

1

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binds to hemoglobin more than 200 times more strongly than oxygen.

Explanation

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