Question 1

What would the partial pressure of oxygen equal if the barometric pressure was 600 mm Hg?

Accepted Answer

A)  125 mm Hg 
B)  159 mm Hg 
C)  100 mm Hg 
D)  60 mm Hg 
A)  125 mm Hg 
B)  159 mm Hg 
C)  100 mm Hg 
D)  60 mm Hg

Question 2

What would the partial pressure of oxygen equal in an air mixture at a depth of 99 feet under water?

Accepted Answer

A)  159 x 4 or 636 mm Hg 
B)  159 x 3 or 477 mm Hg 
C)  159 x 2 or 318 mm Hg 
D)  159 mm Hg 
A)  159 x 4 or 636 mm Hg 
B)  159 x 3 or 477 mm Hg 
C)  159 x 2 or 318 mm Hg 
D)  159 mm Hg

Question 3

What is the normal diffusion capacity of CO?

Accepted Answer

A)  25 mL/min/mm Hg 
B)  20 mL/min/mm Hg 
C)  40 mL/min/mmHg 
D)  60 mL/min/mmHg 
A)  25 mL/min/mm Hg 
B)  20 mL/min/mm Hg 
C)  40 mL/min/mmHg 
D)  60 mL/min/mmHg

Question 4

In the ideal alveolar gas equation,what does 1.25 represent?

Accepted Answer

A)  correction factor for variations in respiratory exchange ratio 
B)  correction factor for variations in barometric pressure 
C)  correction factor for variations in water vapor pressure 
D)  correction factor for variations in FIO₂ 
A)  correction factor for variations in respiratory exchange ratio 
B)  correction factor for variations in barometric pressure 
C)  correction factor for variations in water vapor pressure 
D)  correction factor for variations in FIO₂

Question 5

What is described by the following: "the movement of gas across the alveolar wall is a function of the integrity of the alveolar-capillary membrane'?

Accepted Answer

A)  diffusion limited 
B)  diffusion 
C)  perfusion limited 
D)  perfusion 
A)  diffusion limited 
B)  diffusion 
C)  perfusion limited 
D)  perfusion

Question 6

What are the final three layers (7-8-9)that an oxygen molecule must cross when moving from the alveoli into the blood?

Accepted Answer

A)  plasma of the capillary blood, the erythrocyte membrane, and the intracellular fluid in the erythrocyte. 
B)  the liquid lining the intra-alveolar membrane, alveolar epithelial cell, and the basement membrane of the alveolar epithelial cell 
C)  interstitial space, basement membrane of the capillary endothelium, and the intracellular fluid of the erythrocyte 
D)  the interstitial space, basement membrane of the capillary endothelium, and the capillary endothelium 
A)  plasma of the capillary blood, the erythrocyte membrane, and the intracellular fluid in the erythrocyte. 
B)  the liquid lining the intra-alveolar membrane, alveolar epithelial cell, and the basement membrane of the alveolar epithelial cell 
C)  interstitial space, basement membrane of the capillary endothelium, and the intracellular fluid of the erythrocyte 
D)  the interstitial space, basement membrane of the capillary endothelium, and the capillary endothelium

Question 7

What is derived from the following equation?
X = [PB -PH₂₀] FIO₂ - PaCO₂ (1.25)

Accepted Answer

A)  PAO₂ 
B)  PACO₂ 
C)  PN2 
A)  PAO₂ 
B)  PACO₂ 
C)  PN2

Question 8

Which law states that the rate of diffusion of a gas through the liquid is directly proportional to the solubility coefficient of the gas and inversely proportional to the square root of the GMW of the gas?

Accepted Answer

A)  Graham's law 
B)  Henry's law 
C)  Fick's law 
D)  Dalton's law 
A)  Graham's law 
B)  Henry's law 
C)  Fick's law 
D)  Dalton's law

Question 9

How is oxygen diffusion affected when pulmonary edema is present?

Accepted Answer

A)  Diffusion is indirectly related to thickness of the a-c membrane so diffusion will decrease 
B)  Diffusion is indirectly related to the thickness of the a-c membrane so diffusion will increase 
C)  Diffusion is directly related to thickness of the a-c membrane so diffusion will increase 
D)  Diffusion is directly related to the thickness of the a-c membrane so diffusion will decrease 
A)  Diffusion is indirectly related to thickness of the a-c membrane so diffusion will decrease 
B)  Diffusion is indirectly related to the thickness of the a-c membrane so diffusion will increase 
C)  Diffusion is directly related to thickness of the a-c membrane so diffusion will increase 
D)  Diffusion is directly related to the thickness of the a-c membrane so diffusion will decrease

Question 10

In a healthy adult at rest,what duration is required for diffusion of oxygen and carbon dioxide across the alveolary capillary membrane to be complete?

Accepted Answer

A)  0.25 sec 
B)  0.75 sec 
C)  0.025 sec 
D)  0.075 sec 
A)  0.25 sec 
B)  0.75 sec 
C)  0.025 sec 
D)  0.075 sec

Question 11

What does the PH₂O equal in alveolar gas if the FIO₂ is 0.21?

Accepted Answer

A)  47 mm Hg 
B)  40 mm Hg 
C)  100 mm Hg 
D)  573 mm Hg 
A)  47 mm Hg 
B)  40 mm Hg 
C)  100 mm Hg 
D)  573 mm Hg

Question 12

What effect does an increased altitude have on the percentage that gases compose in the atmosphere?

Accepted Answer

A)  the percentages remain the same but the partial pressures would decrease with altitude 
B)  the partical pressures remain the same but the percentages would decrease 
C)  the percentages and the partial pressures would increase 
D)  the percentages and the partial pressures would decrease 
A)  the percentages remain the same but the partial pressures would decrease with altitude 
B)  the partical pressures remain the same but the percentages would decrease 
C)  the percentages and the partial pressures would increase 
D)  the percentages and the partial pressures would decrease

Question 13

Which of the following is true related to oxygen diffusion?

Accepted Answer

A)  It is normally perfusion limited but under certain abnormal pulmonary conditions can become diffusion limited 
B)  It is normally diffusion limited but under certain abnormal pulmonary condition can become perfusion limited 
C)  It can only be diffusion limited 
D)  It can only be perfusion limited 
A)  It is normally perfusion limited but under certain abnormal pulmonary conditions can become diffusion limited 
B)  It is normally diffusion limited but under certain abnormal pulmonary condition can become perfusion limited 
C)  It can only be diffusion limited 
D)  It can only be perfusion limited

Question 14

What is the term for the passive movement of gas molecules from a high partial pressure to an area of low partial pressure until equilibrium is reached?

Accepted Answer

A)  diffusion 
B)  active transport 
C)  pressure gradient 
D)  osmosis 
A)  diffusion 
B)  active transport 
C)  pressure gradient 
D)  osmosis

Question 15

What percentage of the atmosphere does carbon dioxide compose?

Accepted Answer

A)  0.03% 
B)  0.3% 
C)  3% 
D)  0.003% 
A)  0.03% 
B)  0.3% 
C)  3% 
D)  0.003%

Question 16

What is the solubility of oxygen at 760 mm Hg and 37 ° C?

Accepted Answer

A)  0.0244 mL/mm Hg/mL H₂O 
B)  0.592 mL/mm Hg/ mL H₂O 
C)  0.25 mL/mm Hg/mL H₂O 
D)  0.75 mL/mm Hg/mL H₂O 
A)  0.0244 mL/mm Hg/mL H₂O 
B)  0.592 mL/mm Hg/ mL H₂O 
C)  0.25 mL/mm Hg/mL H₂O 
D)  0.75 mL/mm Hg/mL H₂O

Question 17

Which of the following are central nervous system effects associated with oxygen toxicity?
I.Tremors
II.Twitching
III.Convulsions
IV.coma

Accepted Answer

A)  I, II, III, and IV 
B)  I, II, and III only 
C)  III and IV only 
D)  I, II, and IV only 
A)  I, II, III, and IV 
B)  I, II, and III only 
C)  III and IV only 
D)  I, II, and IV only

Question 18

Which of the following are pulmonary effects associated with oxygen toxicity?
I.Tracheobronchitis
II.Substernal chest pain
III.Increased lung compliance
IV.Increased TLC

Accepted Answer

A)  I and II only 
B)  I, II, and III only 
C)  III and IV only 
D)  I, II, and IV only 
A)  I and II only 
B)  I, II, and III only 
C)  III and IV only 
D)  I, II, and IV only

Question 19

How do the rates of diffusion of CO₂ and O₂ compare?

Accepted Answer

A)  CO₂ diffuses 20 times faster than O₂ 
B)  O₂ diffuses 20 times faster than CO₂ 
C)  CO₂ diffuses 10 times faster than O₂ 
D)  O₂ diffuses 10 times faster than CO₂ 
A)  CO₂ diffuses 20 times faster than O₂ 
B)  O₂ diffuses 20 times faster than CO₂ 
C)  CO₂ diffuses 10 times faster than O₂ 
D)  O₂ diffuses 10 times faster than CO₂

Question 20

Which gas is used to test the physiologic effectiveness of the alveolary-capillary membrane?

Accepted Answer

A)  CO 
B)  CO₂ 
C)  O₂ 
D)  N₂O 
A)  CO 
B)  CO₂ 
C)  O₂ 
D)  N₂O

What would the partial pressure of oxygen equal if the barometric pressure was 600 mm Hg?

What would the partial pressure of oxygen equal in an air mixture at a depth of 99 feet under water?

What is the normal diffusion capacity of CO?

In the ideal alveolar gas equation,what does 1.25 represent?

What is described by the following: "the movement of gas across the alveolar wall is a function of the integrity of the alveolar-capillary membrane'?

What are the final three layers (7-8-9)that an oxygen molecule must cross when moving from the alveoli into the blood?

What is derived from the following equation? X = [PB -PH₂₀] F_IO₂ - PaCO₂ (1.25)

Which law states that the rate of diffusion of a gas through the liquid is directly proportional to the solubility coefficient of the gas and inversely proportional to the square root of the GMW of the gas?

How is oxygen diffusion affected when pulmonary edema is present?

In a healthy adult at rest,what duration is required for diffusion of oxygen and carbon dioxide across the alveolary capillary membrane to be complete?

What does the PH₂O equal in alveolar gas if the F_IO₂ is 0.21?

What effect does an increased altitude have on the percentage that gases compose in the atmosphere?

Which of the following is true related to oxygen diffusion?

What is the term for the passive movement of gas molecules from a high partial pressure to an area of low partial pressure until equilibrium is reached?

What percentage of the atmosphere does carbon dioxide compose?

What is the solubility of oxygen at 760 mm Hg and 37 ° C?

Which of the following are central nervous system effects associated with oxygen toxicity? I.Tremors II.Twitching III.Convulsions IV.coma

Which of the following are pulmonary effects associated with oxygen toxicity? I.Tracheobronchitis II.Substernal chest pain III.Increased lung compliance IV.Increased TLC

How do the rates of diffusion of CO₂ and O₂ compare?

Which gas is used to test the physiologic effectiveness of the alveolary-capillary membrane?

The Anatomy and Physiology of the Respiratory System

Ventilation

Pulmonary Function Measurements

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon DioxideTransport

Acid Base Balance

Ventilation Perfusion Relationships

Control of Ventilation

Fetal Development and the Cardiopulmonary System

Aging and the Cardiopulmonary System

Electrophysiology of the Heart

The Standard 12 ECG System

ECG Interpretation

Hemodynamic Measurements

Renal Failure and Its Effects on the Cardiopulmonary System

Sleep Physiology and Its Relationship to the Cardiopulmonary System

Exercise and Its Effects on the Cardiopulmonary System

High Altitude and Its Effects on the Cardiopulmonary System

High Pressure Environments and Their Effects on the Cardiopulmonary System

Filters

Exam 4: The Diffusion of Pulmonary Gases

What would the partial pressure of oxygen equal if the barometric pressure was 600 mm Hg?

What would the partial pressure of oxygen equal in an air mixture at a depth of 99 feet under water?

What is the normal diffusion capacity of CO?

In the ideal alveolar gas equation,what does 1.25 represent?

What is described by the following: "the movement of gas across the alveolar wall is a function of the integrity of the alveolar-capillary membrane'?

What are the final three layers (7-8-9)that an oxygen molecule must cross when moving from the alveoli into the blood?

What is derived from the following equation? X = [PB -PH₂₀] FIO₂ - PaCO₂ (1.25)

Which law states that the rate of diffusion of a gas through the liquid is directly proportional to the solubility coefficient of the gas and inversely proportional to the square root of the GMW of the gas?

How is oxygen diffusion affected when pulmonary edema is present?

In a healthy adult at rest,what duration is required for diffusion of oxygen and carbon dioxide across the alveolary capillary membrane to be complete?

What does the PH₂O equal in alveolar gas if the FIO₂ is 0.21?

What effect does an increased altitude have on the percentage that gases compose in the atmosphere?

Which of the following is true related to oxygen diffusion?

What is the term for the passive movement of gas molecules from a high partial pressure to an area of low partial pressure until equilibrium is reached?

What percentage of the atmosphere does carbon dioxide compose?

What is the solubility of oxygen at 760 mm Hg and 37 ° C?

Which of the following are central nervous system effects associated with oxygen toxicity? I.Tremors II.Twitching III.Convulsions IV.coma

Which of the following are pulmonary effects associated with oxygen toxicity? I.Tracheobronchitis II.Substernal chest pain III.Increased lung compliance IV.Increased TLC

How do the rates of diffusion of CO₂ and O₂ compare?

Which gas is used to test the physiologic effectiveness of the alveolary-capillary membrane?

The Anatomy and Physiology of the Respiratory System

Ventilation

Pulmonary Function Measurements

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon DioxideTransport

Acid Base Balance

Ventilation Perfusion Relationships

Control of Ventilation

Fetal Development and the Cardiopulmonary System

Aging and the Cardiopulmonary System

Electrophysiology of the Heart

The Standard 12 ECG System

ECG Interpretation

Hemodynamic Measurements

Renal Failure and Its Effects on the Cardiopulmonary System

Sleep Physiology and Its Relationship to the Cardiopulmonary System

Exercise and Its Effects on the Cardiopulmonary System

High Altitude and Its Effects on the Cardiopulmonary System

High Pressure Environments and Their Effects on the Cardiopulmonary System

Filters

What is derived from the following equation? X = [PB -PH₂₀] F_IO₂ - PaCO₂ (1.25)

What does the PH₂O equal in alveolar gas if the F_IO₂ is 0.21?