Which of the following does NOT determine partial pressure of O2 and CO2 in the lungs?

Atmospheric pressure on the moon

Atmospheric pressure of outside air

Rate of alveolar ventilation and perfusion

Humidified air by the upper airway

Diffusion of gas across a fluid membrane (alveolar membrane) can be affected by all of the following EXCEPT:

difference in partial pressures of gases

Exchanging Oxygen And Carbon Dioxide! Trivia Facts Quiz

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| By Dee Erickson

Dee Erickson

Community Contributor

Quizzes Created: 5 | Total Attempts: 1,328

Questions: 10 | Attempts: 228 | Updated: Mar 21, 2023

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Questions and Answers

1.

Diffusion is the spontaneous movement of gases without the use of any energy or effort and requires a concentration/pressure gradient.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Diffusion is a process in which gases move from an area of higher concentration to an area of lower concentration. This movement occurs spontaneously, without the need for any energy input or effort. It relies on the presence of a concentration or pressure gradient, meaning that gases will naturally move from areas where they are more concentrated to areas where they are less concentrated. Therefore, the statement that diffusion is the spontaneous movement of gases without the use of any energy or effort and requires a concentration/pressure gradient is true.

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2.

Oxygen molecules move (diffuse) from an area of (____________) in the alveoli of the lungs to an area of (____________) into the blood where they bind to red blood cells to oxygenate the body.
- A.
  
  Higher PO2; Lower PO2
- B.
  
  Lower PO2; Higher PO2
- C.
  
  Moderate PO2; Mild PO2
- D.
  
  Mild PO2; Moderate PO2
Correct Answer
A. Higher PO2; Lower PO2
3.

Diffusion capacity is a measure of how well oxygen and carbon dioxide are transferred between the lung and the blood.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Diffusion capacity refers to the efficiency with which oxygen and carbon dioxide are exchanged between the lungs and the bloodstream. It is a measure of the lung's ability to transfer these gases, indicating how well the respiratory system functions. Therefore, the statement that diffusion capacity is a measure of how well oxygen and carbon dioxide are transferred between the lung and the blood is true.

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1
0
4.

What is the primary function of hemoglobin?
- A.
  
  Transport carbon dioxide
- B.
  
  Transport oxygen
- C.
  
  Remove nitrogen
- D.
  
  Remove carbon monoxide
Correct Answer
B. Transport oxygen

Explanation
Hemoglobin is a protein found in red blood cells that is responsible for carrying oxygen from the lungs to the rest of the body. It binds to oxygen in the lungs and releases it in the tissues where it is needed. This process is essential for the delivery of oxygen to cells for energy production and overall body function. Therefore, the primary function of hemoglobin is to transport oxygen.

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1
0
5.

As air travels through the respiratory tract and becomes humidified (water is added), the PO2:
- A.
  
  Increases
- B.
  
  Decreases
- C.
  
  Stays the same
Correct Answer
B. Decreases

Explanation
As air travels through the respiratory tract and becomes humidified, the PO2 (partial pressure of oxygen) decreases. This is because as water is added to the air, the concentration of oxygen molecules in the air decreases, leading to a decrease in the partial pressure of oxygen.

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1
0
6.

Which of the following does NOT determine partial pressure of O2 and CO2 in the lungs?
- A.
  
  Atmospheric pressure of outside air
- B.
  
  Atmospheric pressure on the moon
- C.
  
  Rate of alveolar ventilation and perfusion
- D.
  
  Humidified air by the upper airway
Correct Answer
B. AtmospHeric pressure on the moon

Explanation
The partial pressure of a gas is determined by the concentration of that gas in a mixture and the total pressure of the mixture. In the context of the lungs, the partial pressure of O2 and CO2 is determined by factors such as the atmospheric pressure of outside air, the rate of alveolar ventilation and perfusion, and the humidification of air by the upper airway. However, the atmospheric pressure on the moon does not affect the partial pressure of O2 and CO2 in the lungs as it is unrelated to the respiratory system.

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7.

As you expire air the value measured with a PFT device of the PO2 will __________ and the measured value of PCO2 will __________.
- A.
  
  Increase; increase
- B.
  
  Increase; decrease
- C.
  
  Decrease; increase
- D.
  
  Decrease; decrease
Correct Answer
C. Decrease; increase

Explanation
As you expire air, the value measured with a PFT device of the PO2 will decrease because you are exhaling oxygen-rich air. The measured value of PCO2 will increase because you are exhaling carbon dioxide, which increases the level of carbon dioxide in the expired air.

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8.

Diffusion of gas across a fluid membrane (alveolar membrane) can be affected by all of the following EXCEPT:
- A.
  
  Difference in partial pressures of gases
- B.
  
  Surface area of the membrane
- C.
  
  Thickness of the membrane
- D.
  
  Color of the membrane
Correct Answer
D. Color of the membrane

Explanation
The color of the membrane does not affect the diffusion of gas across a fluid membrane. The diffusion of gas is primarily determined by the difference in partial pressures of gases, the surface area of the membrane, and the thickness of the membrane. The color of the membrane has no impact on these factors and therefore does not affect the diffusion process.

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9.

With COPD, some bronchioles are obstructed leaving the alveoli beyond the obstructions unventilated. (no air flow, some blood flow)
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
In individuals with COPD, the airways become narrowed and obstructed, leading to difficulty in breathing. This obstruction affects the bronchioles, which are small airways in the lungs. As a result, some bronchioles are blocked, preventing air from reaching the alveoli, which are tiny air sacs responsible for gas exchange. This lack of ventilation means that the alveoli beyond the obstructions are not receiving fresh air and are therefore unventilated. However, blood flow to these areas can still occur, leading to a mismatch between ventilation and perfusion in the lungs. Hence, the statement is true.

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10.

To convert carbon monoxide-diffusing capacity to oxygen-diffusion capacity, the value is multiplied by a factor of __________.
- A.
  
  1.23
- B.
  
  10.30
- C.
  
  11.1
- D.
  
  50
Correct Answer
A. 1.23

Explanation
To convert carbon monoxide-diffusing capacity to oxygen-diffusion capacity, the value is multiplied by a factor of 1.23. This is because the diffusing capacity of carbon monoxide is approximately 1.23 times higher than the diffusing capacity of oxygen. Therefore, to convert from carbon monoxide-diffusing capacity to oxygen-diffusion capacity, the value needs to be multiplied by this factor.

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Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Apr 02, 2015

Quiz Created by
Dee Erickson

Exchanging Oxygen And Carbon Dioxide! Trivia Facts Quiz

Diffusion is the spontaneous movement of gases without the use of any energy or effort and requires a concentration/pressure gradient.

Oxygen molecules move (diffuse) from an area of () in the alveoli of the lungs to an area of () into the blood where they bind to red blood cells to oxygenate the body.

Diffusion capacity is a measure of how well oxygen and carbon dioxide are transferred between the lung and the blood.

What is the primary function of hemoglobin?

As air travels through the respiratory tract and becomes humidified (water is added), the PO2:

Which of the following does NOT determine partial pressure of O2 and CO2 in the lungs?

As you expire air the value measured with a PFT device of the PO2 will and the measured value of PCO2 will .

Diffusion of gas across a fluid membrane (alveolar membrane) can be affected by all of the following EXCEPT:

With COPD, some bronchioles are obstructed leaving the alveoli beyond the obstructions unventilated. (no air flow, some blood flow)

To convert carbon monoxide-diffusing capacity to oxygen-diffusion capacity, the value is multiplied by a factor of __________.

Exchanging Oxygen And Carbon Dioxide! Trivia Facts Quiz

Diffusion is the spontaneous movement of gases without the use of any energy or effort and requires a concentration/pressure gradient.

Oxygen molecules move (diffuse) from an area of (____________) in the alveoli of the lungs to an area of (____________) into the blood where they bind to red blood cells to oxygenate the body.

Diffusion capacity is a measure of how well oxygen and carbon dioxide are transferred between the lung and the blood.

What is the primary function of hemoglobin?

As air travels through the respiratory tract and becomes humidified (water is added), the PO2:

Which of the following does NOT determine partial pressure of O2 and CO2 in the lungs?

As you expire air the value measured with a PFT device of the PO2 will __________ and the measured value of PCO2 will __________.

Diffusion of gas across a fluid membrane (alveolar membrane) can be affected by all of the following EXCEPT:

With COPD, some bronchioles are obstructed leaving the alveoli beyond the obstructions unventilated. (no air flow, some blood flow)

To convert carbon monoxide-diffusing capacity to oxygen-diffusion capacity, the value is multiplied by a factor of __________.

Oxygen molecules move (diffuse) from an area of () in the alveoli of the lungs to an area of () into the blood where they bind to red blood cells to oxygenate the body.

As you expire air the value measured with a PFT device of the PO2 will and the measured value of PCO2 will .