Question 1

Which of the choices below describes the forces that act to pull the lungs away from the thorax wall and thus collapse the lungs?

Accepted Answer

A)  the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid
B)  compliance and transpulmonary pressures
C)  compliance and the surface tension of the alveolar fluid
D)  the natural tendency for the lungs to recoil and transpulmonary pressuresE) None of the above
F) A) and D)

Question 2

How is the bulk of carbon dioxide carried in blood?

Accepted Answer

A)  chemically combined with the heme portion of hemoglobin
B)  as carbonic acid in the plasma
C)  chemically combined with the amino acids of hemoglobin as carbaminohemoglobin in the red blood cells
D)  as the bicarbonate ion in the plasma after first entering the red blood cellsE) A) and D)
F) B) and C)

Question 3

Select the correct statement about the physical factors influencing pulmonary ventilation.

Accepted Answer

A)  A lung that is less elastic will require less muscle action to perform adequate ventilation.
B)  As alveolar surface tension increases,additional muscle action will be required.
C)  Surfactant helps increase alveolar surface tension.
D)  A decrease in compliance causes an increase in ventilation.E) A) and B)
F) C) and D)

Question 4

How is alveolar gas exchange affected by emphysema and pneumonia?

Accepted Answer

With pneumonia,if the lungs become edema...

Question 5

Which of the following is not true of the respiratory tract from the medium bronchi to the aveoli?

Accepted Answer

A)  Proportionally,smooth muscle decreases uniformly.
B)  Lining of the tubes changes from ciliated columnar to simple squamous epithelium in the alveoli.
C)  Resistance to air flow increases due to the increase in cross- sectional diameter.
D)  Cartilage gradually decreases and disappears at the bronchioles.E) A) and B)
F) B) and C)

Question 6

Complete the following statement using the choices below.Air moves out of the lungs when the pressure inside the lungs is

Accepted Answer

A)  equal to the pressure in the atmosphere.
B)  greater than the intra- alveolar pressure.
C)  less than the pressure in the atmosphere.
D)  greater than the pressure in the atmosphere.E) A) and D)
F) C) and D)

Question 7

Select the correct statement about oxygen transport in blood:

Accepted Answer

A)  During normal activity,a molecule of hemoglobin returning to the lungs carries one molecule of O2.
B)  Increased BPG levels in the red blood cells enhance oxygen- carrying capacity.
C)  During conditions of acidosis,hemoglobin is able to carry oxygen more efficiently.
D)  A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.E) A) and B)
F) A) and C)

Question 8

Possible causes of hypoxia include .

Accepted Answer

A)  too little oxygen in the atmosphere
B)  getting very cold
C)  taking several rapid deep breaths
D)  obstruction of the esophagusE) A) and B)
F) B) and D)

Question 9

Which of the following provide the greatest surface area for gas exchange?

Accepted Answer

A)  alveolar ducts
B)  alveoli
C)  alveolar sacs
D)  respiratory bronchiolesE) A) and B)
F) B) and D)

Question 10

Which of the disorders below is characterized by destruction of the walls of the alveoli producing abnormally large air spaces that remain filled with air during exhalation?

Accepted Answer

A)  tuberculosis
B)  emphysema
C)  coryza
D)  pneumoniaE) A) and B)
F) C) and D)

Question 11

How is it possible to change the pitch of our voice from high to low?

Accepted Answer

Usually,the tenser the vocal folds,the f...

Question 12

Which of the choices below is not a factor that promotes oxygen binding to and dissociation from hemoglobin?

Accepted Answer

A)  number of red blood cells
B)  partial pressure of oxygen
C)  partial pressure of carbon dioxide
D)  temperatureE) None of the above
F) A) and B)

Question 13

Unlike inspiration,expiration is a passive act because no muscular contractions are involved.Expiration,however,depends on two factors.Which of the choices below lists those two factors?

Accepted Answer

A)  the expansion of respiratory muscles that were contracted during inspiration and the lack of surface tension on the alveolar wall
B)  combined amount of CO2 in the blood and air in the alveoli
C)  the negative feedback of expansion fibers used during inspiration and the outward pull of surface tension due to surfactant
D)  the recoil of elastic fibers that were stretched during inspiration and the inward pull of surface tension due to the film of alveolar fluidE) A) and B)
F) A) and D)

Question 14

Select the correct statement about the pharynx.

Accepted Answer

A)  The laryngopharynx blends posteriorly into the nasopharynx.
B)  The pharyngeal tonsil is located in the laryngopharynx.
C)  The auditory tube drains into the nasopharynx.
D)  The palatine tonsils are embedded in the lateral walls of the nasopharynx.E) B) and D)
F) A) and B)

Question 15

Tidal volume is air .

Accepted Answer

A)  forcibly expelled after normal expiration
B)  inhaled after normal inspiration
C)  exchanged during normal breathing
D)  remaining in the lungs after forced expirationE) B) and C)
F) C) and D)

Question 16

Which of the following correctly describes mechanisms of CO2 transport?

Accepted Answer

A)  7-10% of CO2 is dissolved directly into the plasma
B)  as bicarbonate ion in plasma
C)  attached to the heme part of hemoglobin
D)  20% of CO2 is carried in the form of carbaminohemoglobinE) A) and B)
F) B) and C)

Question 17

Which of the following is not an event necessary to supply the body with O2 and dispose of CO2?

Accepted Answer

A)  external respiration
B)  pulmonary ventilation
C)  internal respiration
D)  blood pH adjustmentE) None of the above
F) A) and B)

Question 18

Oxygen unloading in a RBC due to declining pH is called the .

Accepted Answer

The answer of Oxygen unloading in a RBC due to...

Question 19

Distinguish among anemic,ischemic,histotoxic,and hypoxemic hypoxia.

Accepted Answer

Anemic hypoxia reflects poor oxygen deli...

Question 20

In the plasma,the quantity of oxygen in solution is .

Accepted Answer

A)  greater than the oxygen combined with hemoglobin
B)  not present except where it is combined with carrier molecules
C)  about equal to the oxygen combined with hemoglobin
D)  only about 1.5% of the oxygen carried in dissolved formE) B) and C)
F) A) and C)

Exam 21: The Respiratory System

Which of the following correctly describes mechanisms of CO2 transport?

Correct AnswerverifiedShow Answer

Select the correct statement about the physical factors influencing pulmonary ventilation.

Correct AnswerverifiedShow Answer

Unlike inspiration,expiration is a passive act because no muscular contractions are involved.Expiration,however,depends on two factors.Which of the choices below lists those two factors?

Correct AnswerverifiedShow Answer

Which of the following provide the greatest surface area for gas exchange?

Correct AnswerverifiedShow Answer

Which of the choices below is not a factor that promotes oxygen binding to and dissociation from hemoglobin?

Correct AnswerverifiedShow Answer

Which of the disorders below is characterized by destruction of the walls of the alveoli producing abnormally large air spaces that remain filled with air during exhalation?

Correct AnswerverifiedShow Answer

Tidal volume is air .

Correct AnswerverifiedShow Answer

Which of the choices below describes the forces that act to pull the lungs away from the thorax wall and thus collapse the lungs?

Correct AnswerverifiedShow Answer

Select the correct statement about oxygen transport in blood:

Correct AnswerverifiedShow Answer

Distinguish among anemic,ischemic,histotoxic,and hypoxemic hypoxia.

Correct AnswerverifiedAnemic hypoxia reflects poor oxygen deli...View AnswerShow Answer

Select the correct statement about the pharynx.

Correct AnswerverifiedShow Answer

Which of the following is not true of the respiratory tract from the medium bronchi to the aveoli?

Correct AnswerverifiedShow Answer

In the plasma,the quantity of oxygen in solution is .

Correct AnswerverifiedShow Answer

Oxygen unloading in a RBC due to declining pH is called the .

Correct AnswerverifiedShow Answer

How is it possible to change the pitch of our voice from high to low?

Correct AnswerverifiedUsually,the tenser the vocal folds,the f...View AnswerShow Answer

How is the bulk of carbon dioxide carried in blood?

Correct AnswerverifiedShow Answer

How is alveolar gas exchange affected by emphysema and pneumonia?

Correct AnswerverifiedWith pneumonia,if the lungs become edema...View AnswerShow Answer

Complete the following statement using the choices below.Air moves out of the lungs when the pressure inside the lungs is

Correct AnswerverifiedShow Answer

Which of the following is not an event necessary to supply the body with O2 and dispose of CO2?

Correct AnswerverifiedShow Answer

Possible causes of hypoxia include .

Correct AnswerverifiedShow Answer

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Anemic hypoxia reflects poor oxygen deli...
View Answer

Correct Answer
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Correct Answer
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Usually,the tenser the vocal folds,the f...
View Answer

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With pneumonia,if the lungs become edema...
View Answer

Correct Answer
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