Question 1

The largest of the laryngeal cartilages is the

Accepted Answer

A)   epiglottis.
B)   thyroid cartilage.
C)   cricoid cartilage.
D)   corniculate cartilage.
E)   cuneiform cartilage.F) B) and E)
G) A) and E)

Question 2

Surfactant facilitates alveolar ventilation by

Accepted Answer

A)   decreasing the surface tension between water molecules on the lining of the alveoli.
B)   decreasing thoracic compliance.
C)   attracting water to the alveolar surface.
D)   increasing the surface area for gas exchange.
E)   increases the surface tension between fluid and the alveoli.F) A) and B)
G) A) and E)

Question 3

The lungs have

Accepted Answer

A)   one blood flow route and one lymphatic supply.
B)   two blood flow routes and one lymphatic supply.
C)   one blood flow route and two lymphatic supplies.
D)   two blood flow routes and two lymphatic supplies.
E)   three blood flow routes and one lymphatic supply.F) B) and C)
G) A) and E)

Question 4

For air to flow into or out of the lungs, there must be

Accepted Answer

A)   a volume gradient established between the atmosphere and the alveoli.
B)   a temperature gradient between the atmosphere and the alveoli.
C)   a pressure gradient established between the atmosphere and the alveoli.
D)   a diffusion gradient between the atmosphere and the alveoli.
E)   None of these choices is correct.F) B) and D)
G) A) and D)

Question 5

The posterior wall of the trachea contains smooth muscle called the __________ muscle.

Accepted Answer

The answer of The posterior wall of the trachea contains...

Question 6

A protective function of the respiratory system would be

Accepted Answer

A)   altering blood pH by changing blood CO2 levels.
B)   olfaction by drawing molecules into the nasal cavity.
C)   producing ACE which helps regulate blood pressure.
D)   preventing microorganisms from entering the body.E) None of the above
F) A) and B)

Question 7

Use the following two choices.
-decrease in body temperature

Accepted Answer

A)  oxygen-hemoglobin dissociation curve shifts to the right
B)  oxygen-hemoglobin dissociation curve shifts to the leftC) A) and B)
D) undefined

Question 8

Match the disorder of the respiratory system with the best description.
-sudden infant death syndrome (SIDS)

Accepted Answer

A)  destruction of the alveolar walls
B)  inflammation of the bronchii
C)  inherited disease that affects secretory cells lining the lungs
D)  replacement of lung tissue with fibrous connective tissue
E)  infant stops breathing during sleepF) A) and D)
G) B) and D)

Question 9

When air passes through the glottis, which structures vibrate to produce sound?

Accepted Answer

A)   thyroid folds
B)   ventricular folds
C)   epiglottal cords
D)   cricohyoid folds
E)   vocal folds (cords) F) B) and D)
G) None of the above

Question 10

Arrange the following in order from highest to lowest PO2. (1)  PO2 of pulmonary veins
(2)  PO2 of pulmonary artery
(3)  PO2 of alveolar air

Accepted Answer

A)   1, 2, 3
B)   2, 1, 3
C)   2, 3, 1
D)   3, 1, 2
E)   3, 2, 1F) B) and E)
G) A) and E)

Question 11

Normally, the partial pressure of oxygen gas is higher in the

Accepted Answer

A)   blood of the pulmonary capillaries.
B)   bronchioles.
C)   alveoli.
D)   venous blood.E) A) and B)
F) A) and C)

Question 12

Hemoglobin that has oxygen attached is called

Accepted Answer

A)   hemoglobin-oxygen complex.
B)   carbaminohemoglobin.
C)   oxyhemoglobin.
D)   deoxyhemoglobin.
E)   globoxygen.F) A) and C)
G) A) and B)

Question 13

-The diagram illustrates the major regulatory mechanisms of ventilation. What mechanism does "C" represent?

Accepted Answer

A)   Hering-Breuer reflex
B)   receptors for touch, temperature, pain stimuli
C)   medullary chemoreceptors
D)   carotid and aortic body chemoreceptors
E)   proprioceptorsF) A) and B)
G) A) and C)

Question 14

A respiratory disease characterized by decreased chloride ion diffusion out of cells and dehydrated respiratory secretions is

Accepted Answer

A)   bronchitis.
B)   emphysema.
C)   cystic fibrosis.
D)   pulmonary fibrosis.
E)   lung cancer.F) A) and C)
G) C) and D)

Question 15

After hyperventilating for several minutes, a person may develop short periods of apnea because

Accepted Answer

A)   blood pH would drop and inhibit inspiration.
B)   oxygen in the lungs has not had time to diffuse into the blood.
C)   the level of oxygen has increased and inhibits the inspiratory center.
D)   the level of CO2 decreases below the level necessary to stimulate the inspiratory center.
E)   blood pH will rise and stimulate expiration.F) C) and D)
G) B) and D)

Question 16

Internal respiration refers to

Accepted Answer

A)   atmospheric air coming into the lungs.
B)   gas exchange between the lungs and the blood.
C)   gas exchange in the atmosphere.
D)   gas exchange between the blood and body tissues.
E)   cellular respiration.F) A) and B)
G) A) and E)

Question 17

It is possible to consciously control the rate and depth of respiration.

Accepted Answer

A) True 
 B)False

Question 18

Ventilation refers to the

Accepted Answer

A)   movement of air into and out of the lungs.
B)   gas exchange between the blood and the tissues.
C)   transportation of oxygen and carbon dioxide in the blood.
D)   gas exchange between the air in the lungs and the blood.
E)   respiration at the cellular level.F) None of the above
G) A) and D)

Question 19

If the total pressure of a mixture of gases was 760 mm Hg and its composition is 20% oxygen, 0.04% carbon dioxide, 75% nitrogen, and 5% water vapor, then the partial pressure of oxygen would be

Accepted Answer

A)   740 mm Hg.
B)   20 mm Hg.
C)   148 mm Hg.
D)   152 mm Hg.
E)   200 mm Hg.F) A) and D)
G) B) and E)

Question 20

Which of the following is NOT a function of the pseudostratified ciliated columnar epithelium of the nasal cavity?

Accepted Answer

A)   traps dirt and removes it from the air
B)   moisturizes the air
C)   exchanges oxygen and carbon dioxide
D)   warms the airE) A) and B)
F) A) and C)

Exam 23: Respiratory System

A protective function of the respiratory system would be

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Surfactant facilitates alveolar ventilation by

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The lungs have

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For air to flow into or out of the lungs, there must be

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Ventilation refers to the

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The posterior wall of the trachea contains smooth muscle called the __________ muscle.

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The largest of the laryngeal cartilages is the

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-The diagram illustrates the major regulatory mechanisms of ventilation. What mechanism does "C" represent?

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Match the disorder of the respiratory system with the best description. -sudden infant death syndrome (SIDS)

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Which of the following is NOT a function of the pseudostratified ciliated columnar epithelium of the nasal cavity?

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When air passes through the glottis, which structures vibrate to produce sound?

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Use the following two choices. -decrease in body temperature

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If the total pressure of a mixture of gases was 760 mm Hg and its composition is 20% oxygen, 0.04% carbon dioxide, 75% nitrogen, and 5% water vapor, then the partial pressure of oxygen would be

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Internal respiration refers to

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Arrange the following in order from highest to lowest PO2. (1) PO2 of pulmonary veins (2) PO2 of pulmonary artery (3) PO2 of alveolar air

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Normally, the partial pressure of oxygen gas is higher in the

Correct AnswerverifiedShow Answer

It is possible to consciously control the rate and depth of respiration.

Correct AnswerverifiedShow Answer

After hyperventilating for several minutes, a person may develop short periods of apnea because

Correct AnswerverifiedShow Answer

Hemoglobin that has oxygen attached is called

Correct AnswerverifiedShow Answer

A respiratory disease characterized by decreased chloride ion diffusion out of cells and dehydrated respiratory secretions is

Correct AnswerverifiedShow Answer

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Arrange the following in order from highest to lowest PO₂. (1) PO₂ of pulmonary veins (2) PO₂ of pulmonary artery (3) PO₂ of alveolar air

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