Question 1

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

Accepted Answer

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

Question 2

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

Question 3

In a healthy individual at rest, what is the average carbon dioxide tension of venous content blood as it enters the pulmonary capillary?

Accepted Answer

A)  35 mm Hg 
B)  46 mm Hg 
C)  27 mm Hg 
D)  40 mm Hg 
A)  35 mm Hg 
B)  46 mm Hg 
C)  27 mm Hg 
D)  40 mm Hg

Question 4

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

Question 5

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

Accepted Answer

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

Question 6

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

Question 7

What is the partial pressure of nitrogen if the barometric pressure is 760 mm Hg?

Accepted Answer

A)  592.8 mm Hg 
B)  500.4 mm Hg 
C)  420 mm Hg 
D)  625.6 mm Hg 
A)  592.8 mm Hg 
B)  500.4 mm Hg 
C)  420 mm Hg 
D)  625.6 mm Hg

Question 8

Which of the following pulmonary disorders cause the alveolar-capillary membrane thickness to increase?
I. Pulmonary edema
II. Scleroderma
III. ARDS
IV. Pneumonia

Accepted Answer

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

Question 9

Which law is represented by the equation below? V gas = [AD (P1-P2)] / T

Accepted Answer

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

Question 10

When breathing room air, what is the PN2 in the arterial blood?

Accepted Answer

A)  573 mm Hg 
B)  700 mm Hg 
C)  593 mm Hg 
D)  473 mmHg 
A)  573 mm Hg 
B)  700 mm Hg 
C)  593 mm Hg 
D)  473 mmHg

Question 11

When can the simplified alveolar gas equation be used?
I. PaCO2 less than 60 mm Hg
II. PaCO2 greater than 60 mm Hg
III. FIO2 0.6 or greater
IV. FIO2 0.6 or lower

Accepted Answer

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

Question 12

In order, what are the first three layers of the alveolar capillary membrane that an oxygen molecule crosses?
I. Liquid lining the intra-alveolar membrane
II. Alveolar epithelial cell
III. Basement membrane of the alveolar epithelial cell
IV. Interstitial space

Accepted Answer

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

Question 13

Which law states that the amount of gas that dissolves in a liquid is directly related to the partial pressure of the gas?

Accepted Answer

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

Question 14

What is the term for the movement of gas molecules from an area of high pressure to an area of low pressure?

Accepted Answer

A)  dispersion 
B)  ventilation 
C)  diffusion 
D)  osmosis 
A)  dispersion 
B)  ventilation 
C)  diffusion 
D)  osmosis

Question 15

How is oxygen diffusion affected when pulmonary edema is present?

Accepted Answer

A)  Diffusion is directly related to thickness of the a-c membrane so diffusion will increase 
B)  Diffusion is indirectly related to thickness of the a-c membrane so diffusion will decrease 
C)  Diffusion is indirectly related to the 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 directly related to thickness of the a-c membrane so diffusion will increase 
B)  Diffusion is indirectly related to thickness of the a-c membrane so diffusion will decrease 
C)  Diffusion is indirectly related to the 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 16

What is the term for the situation in which "the rate of gas transfer across the alveolar wall is a function of the amount of blood that flows past the alveoli" ?

Accepted Answer

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

Question 17

For a healthy adult at rest, what is the normal pressure gradient for oxygen across the alveolar-capillary membrane when breathing room air at sea level?

Accepted Answer

A)  60 mm Hg 
B)  40 mm Hg 
C)  46 mm Hg 
D)  6 mm Hg 
A)  60 mm Hg 
B)  40 mm Hg 
C)  46 mm Hg 
D)  6 mm Hg

Question 18

What are the middle three layers (4-5-6) that an oxygen molecule must cross when moving from the alveoli into the blood?

Accepted Answer

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

Question 19

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

Accepted Answer

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

Question 20

Which gas law is represented by Ptotal = P1 + P2 + P3....?

Accepted Answer

A)  Boyle's 
B)  Dalton's 
C)  Charles' 
D)  Henry's 
A)  Boyle's 
B)  Dalton's 
C)  Charles' 
D)  Henry's

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

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?

In a healthy individual at rest, what is the average carbon dioxide tension of venous content blood as it enters the pulmonary capillary?

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?

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

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

What is the partial pressure of nitrogen if the barometric pressure is 760 mm Hg?

Which of the following pulmonary disorders cause the alveolar-capillary membrane thickness to increase? I. Pulmonary edema II. Scleroderma III. ARDS IV. Pneumonia

Which law is represented by the equation below? V gas = [AD (P1-P2)] / T

When breathing room air, what is the P_N2 in the arterial blood?

When can the simplified alveolar gas equation be used? I. PaCO₂ less than 60 mm Hg II. PaCO₂ greater than 60 mm Hg III. FIO₂ 0.6 or greater IV. FIO₂ 0.6 or lower

In order, what are the first three layers of the alveolar capillary membrane that an oxygen molecule crosses? I. Liquid lining the intra-alveolar membrane II. Alveolar epithelial cell III. Basement membrane of the alveolar epithelial cell IV. Interstitial space

Which law states that the amount of gas that dissolves in a liquid is directly related to the partial pressure of the gas?

What is the term for the movement of gas molecules from an area of high pressure to an area of low pressure?

How is oxygen diffusion affected when pulmonary edema is present?

What is the term for the situation in which "the rate of gas transfer across the alveolar wall is a function of the amount of blood that flows past the alveoli" ?

For a healthy adult at rest, what is the normal pressure gradient for oxygen across the alveolar-capillary membrane when breathing room air at sea level?

What are the middle three layers (4-5-6) that an oxygen molecule must cross when moving from the alveoli into the blood?

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

Which gas law is represented by P_total = P₁ + P₂ + P₃....?

The Anatomy and Physiology of the Respitory System

Ventilation

Pulmonary Function Measurements

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon Dioxide Transport

Acid-Base Balance and Regulation

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

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?

In a healthy individual at rest, what is the average carbon dioxide tension of venous content blood as it enters the pulmonary capillary?

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?

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

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

What is the partial pressure of nitrogen if the barometric pressure is 760 mm Hg?

Which of the following pulmonary disorders cause the alveolar-capillary membrane thickness to increase? I. Pulmonary edema II. Scleroderma III. ARDS IV. Pneumonia

Which law is represented by the equation below? V gas = [AD (P1-P2)] / T

When breathing room air, what is the PN2 in the arterial blood?

When can the simplified alveolar gas equation be used? I. PaCO2 less than 60 mm Hg II. PaCO2 greater than 60 mm Hg III. FIO2 0.6 or greater IV. FIO2 0.6 or lower

In order, what are the first three layers of the alveolar capillary membrane that an oxygen molecule crosses? I. Liquid lining the intra-alveolar membrane II. Alveolar epithelial cell III. Basement membrane of the alveolar epithelial cell IV. Interstitial space

Which law states that the amount of gas that dissolves in a liquid is directly related to the partial pressure of the gas?

What is the term for the movement of gas molecules from an area of high pressure to an area of low pressure?

How is oxygen diffusion affected when pulmonary edema is present?

What is the term for the situation in which "the rate of gas transfer across the alveolar wall is a function of the amount of blood that flows past the alveoli" ?

For a healthy adult at rest, what is the normal pressure gradient for oxygen across the alveolar-capillary membrane when breathing room air at sea level?

What are the middle three layers (4-5-6) that an oxygen molecule must cross when moving from the alveoli into the blood?

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

Which gas law is represented by Ptotal = P1 + P2 + P3....?

The Anatomy and Physiology of the Respitory System

Ventilation

Pulmonary Function Measurements

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon Dioxide Transport

Acid-Base Balance and Regulation

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

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

When breathing room air, what is the P_N2 in the arterial blood?

When can the simplified alveolar gas equation be used? I. PaCO₂ less than 60 mm Hg II. PaCO₂ greater than 60 mm Hg III. FIO₂ 0.6 or greater IV. FIO₂ 0.6 or lower

Which gas law is represented by P_total = P₁ + P₂ + P₃....?