Question 1

The largest amount of carbon dioxide is transported in the bloodstream in the form of carbonic anhydrase.

Accepted Answer

A) True 
 B)False

Question 2

Which center is located in the pons?

Accepted Answer

A)  inspiratory center
B)  pacemaker neuron center
C)  pontine respirator group (PRG) 
D)  expiratory centerE) C) and D)
F) None of the above

Question 3

How is alveolar gas exchange affected by emphysema and pneumonia?

Accepted Answer

With pneumonia,if the lungs become edema...

Question 4

Which of the following anchor(s) the vocal folds?

Accepted Answer

A)  cuneiform cartilages
B)  arytenoid cartilages
C)  cricoid cartilage
D)  corniculate cartilagesE) All of the above
F) A) and B)

Question 5

Select the correct statement about oxygen transport in blood.

Accepted Answer

A)  During conditions of acidosis,hemoglobin is able to carry oxygen more efficiently.
B)  Increased BPG levels in the red blood cells enhance oxygen-carrying capacity.
C)  A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
D)  During normal activity,a molecule of hemoglobin returning to the lungs carries one molecule of O2.E) B) and C)
F) None of the above

Question 6

The loudness of a person's voice depends on the ________.

Accepted Answer

A)  length of the vocal folds
B)  force with which air rushes across the vocal folds
C)  thickness of vestibular folds
D)  strength of the intrinsic laryngeal musclesE) All of the above
F) A) and C)

Question 7

Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture.

Accepted Answer

A) True 
 B)False

Question 8

The main site of gas exchange is the ________.

Accepted Answer

A)  alveolar duct
B)  respiratory bronchiole
C)  alveoli
D)  alveolar sacsE) A) and D)
F) All of the above

Question 9

Which of the following maintains the patency (openness) of the trachea?

Accepted Answer

A)  pseudostratified ciliated epithelium
B)  C-shaped cartilage rings
C)  surfactant production
D)  surface tension of waterE) A) and C)
F) All of the above

Question 10

Which of the following is the leading cause of cancer death for both men and women in North America?

Accepted Answer

A)  lung
B)  colorectal
C)  esophageal
D)  skinE) A) and B)
F) B) and C)

Question 11

How is the bulk of carbon dioxide transported in blood?

Accepted Answer

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

Question 12

The nose serves all of the following functions EXCEPT ________.

Accepted Answer

A)  cleansing the air
B)  warming and humidifying the air
C)  as a passageway for air movement
D)  as the direct initiator of the cough reflexE) None of the above
F) A) and B)

Question 13

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)  temperature
C)  partial pressure of oxygen
D)  partial pressure of carbon dioxideE) None of the above
F) A) and D)

Question 14

What is the chloride shift and why does it occur?

Accepted Answer

The chloride shift is an ionic exchange ...

Question 15

As carbon dioxide enters systemic blood,it causes more oxygen to dissociate from hemoglobin (the Haldane effect),which in turn allows more CO2 to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect).

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is responsible for holding the lungs to the thorax wall are ________.

Accepted Answer

A)  the visceral pleurae and the changing volume of the lungs
B)  the smooth muscles of the lung
C)  the diaphragm and the intercostal muscles alone
D)  surface tension from pleural fluid and negative pressure in the pleural cavityE) All of the above
F) C) and D)

Question 17

Under certain conditions,the vocal folds act as a sphincter that prevents air passage.

Accepted Answer

A) True 
 B)False

Question 18

For inspiration of air,which of the following happens first?

Accepted Answer

A)  diaphragm descends and rib cage rises
B)  intrapulmonary pressure drops
C)  air (gases) flows into lungs
D)  thoracic cavity volume decreasesE) C) and D)
F) A) and B)

Question 19

The contraction of the diaphragm and the external intercostal muscles begins inspiration.Explain exactly what happens,in terms of volume and pressure changes in the lungs,when these muscles contract.

Accepted Answer

With contraction of the diaphragm,the he...

Question 20

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)  compliance and transpulmonary pressures
B)  compliance and the surface tension of the alveolar fluid
C)  the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid
D)  the natural tendency for the lungs to recoil and transpulmonary pressuresE) B) and C)
F) A) and D)

Exam 22: The Respiratory System

How is alveolar gas exchange affected by emphysema and pneumonia?

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

Which of the following is responsible for holding the lungs to the thorax wall are ________.

Correct AnswerverifiedShow Answer

What is the chloride shift and why does it occur?

Correct AnswerverifiedThe chloride shift is an ionic exchange ...View AnswerShow Answer

How is the bulk of carbon dioxide transported in blood?

Correct AnswerverifiedShow Answer

The nose serves all of the following functions EXCEPT ________.

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

Which center is located in the pons?

Correct AnswerverifiedShow Answer

Which of the following is the leading cause of cancer death for both men and women in North America?

Correct AnswerverifiedShow Answer

Under certain conditions,the vocal folds act as a sphincter that prevents air passage.

Correct AnswerverifiedShow Answer

Select the correct statement about oxygen transport in blood.

Correct AnswerverifiedShow Answer

The largest amount of carbon dioxide is transported in the bloodstream in the form of carbonic anhydrase.

Correct AnswerverifiedShow Answer

Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The main site of gas exchange is the ________.

Correct AnswerverifiedShow Answer

For inspiration of air,which of the following happens first?

Correct AnswerverifiedShow Answer

The loudness of a person's voice depends on the ________.

Correct AnswerverifiedShow Answer

Which of the following anchor(s) the vocal folds?

Correct AnswerverifiedShow Answer

The contraction of the diaphragm and the external intercostal muscles begins inspiration.Explain exactly what happens,in terms of volume and pressure changes in the lungs,when these muscles contract.

Correct AnswerverifiedWith contraction of the diaphragm,the he...View AnswerShow Answer

As carbon dioxide enters systemic blood,it causes more oxygen to dissociate from hemoglobin (the Haldane effect),which in turn allows more CO2 to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect).

Correct AnswerverifiedShow Answer

Which of the following maintains the patency (openness) of the trachea?

Correct AnswerverifiedShow Answer

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

Correct Answer
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Correct Answer
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The chloride shift is an ionic exchange ...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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With contraction of the diaphragm,the he...
View Answer

As carbon dioxide enters systemic blood,it causes more oxygen to dissociate from hemoglobin (the Haldane effect),which in turn allows more CO₂ to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect).

Correct Answer
verified

Correct Answer
verified