Question 1

The chemosensitive area of the brain is located in the

Accepted Answer

A)   pons.
B)   cerebral peduncles.
C)   cerebellum.
D)   hypothalamus.
E)   medulla oblongata.F) A) and D)
G) A) and E)

Question 2

Which of the following is NOT a function of the respiratory system?

Accepted Answer

A)   olfaction
B)   taste
C)   production of chemical mediators
D)   voice production
E)   regulation of blood pHF) B) and D)
G) B) and E)

Question 3

Use the following key to determine the best answer.
-(1)  PO2 in alveolar air;
(2)  PO2 in venous blood

Accepted Answer

A)  Choose this if the first item is greater than the second item.
B)  Choose this if the first item is less than the second item.
C)  Choose this if the first item is equal or nearly equal to the second item.D) None of the above
E) B) and C)

Question 4

Arrange the following structures in the order air passes through them during inhalation: (1)  alveolar ducts
(2)  alveolus
(3)  respiratory bronchiole
(4)  terminal bronchiole

Accepted Answer

A)   1, 2, 3, 4
B)   2, 1, 3, 4
C)   4, 3, 1, 2
D)   3, 2, 1, 4
E)   4, 3, 2, 1F) C) and E)
G) D) and E)

Question 5

The walls of the alveoli

Accepted Answer

A)   are composed of simple squamous epithelium.
B)   contain several layers of smooth muscle.
C)   contain goblet cells.
D)   are surrounded by cartilage.
E)   are ciliated.F) A) and E)
G) All of the above

Question 6

All of the following are changes seen in the respiratory system with aging, except

Accepted Answer

A)   Decreased vital capacity
B)   Decreased maximum minute ventilation
C)   Increased deadspace
D)   Decreased inspiratory reserve volume
E)   Decreased lung complianceF) B) and C)
G) C) and D)

Question 7

During exercise, the oxygen-hemoglobin dissociation curve

Accepted Answer

A)   shifts to the right.
B)   shifts to the left.
C)   doesn't shift.D) A) and B)
E) All of the above

Question 8

Mr. Smith hypoventilates and retains too much carbon dioxide. Which of the following receptors is stimulated by an increase in carbon dioxide?

Accepted Answer

A)   irritant receptors
B)   pressure receptors
C)   osmoreceptors
D)   peripheral chemoreceptors
E)   baroreceptorsF) A) and C)
G) B) and E)

Question 9

Rhythmicity of breathing involves

Accepted Answer

A)   conscious effort and control.
B)   stimulation of inspiration. Expiration is automatic.
C)   pontine respiratory group as a necessary part.
D)   a set pattern of inspiration - expiration that is always the same.
E)   the pre-Bötzinger complex of the ventral respiratory group.F) A) and E)
G) C) and E)

Question 10

The olfactory epithelium responsible for the sense of smell is located in the

Accepted Answer

A)   floor of the nasal cavity.
B)   wall of the nasal septum.
C)   lining of the nasopharynx.
D)   cavity of the paranasal sinuses.
E)   roof of the nasal cavity.F) C) and D)
G) A) and E)

Question 11

The Bohr effect refers to the

Accepted Answer

A)   mechanism involved in diffusion of nitrogen into the blood.
B)   physical laws governing the solubility of gases in fluids.
C)   effect of pH on the oxygen-hemoglobin dissociation curve.
D)   chemical equilibrium between carbonic acid and bicarbonate in the blood.
E)   effect of temperature on the oxygen-hemoglobin dissociation curve.F) B) and D)
G) A) and E)

Question 12

When these ligaments or folds come together, they prevent food from entering the lower respiratory tract.

Accepted Answer

A)   vocal folds
B)   vestibular folds
C)   cricothyroid ligaments
D)   epiglottic folds
E)   vocal folds and vestibular foldsF) A) and E)
G) A) and D)

Question 13

As acidity increases, how does this affect the affinity of hemoglobin for the oxygen it carries?

Accepted Answer

A)   Oxyhemoglobin affinity decreases.
B)   Oxyhemoglobin affinity increases.
C)   Oxyhemoglobin affinity remains the same.
D)   Hemoglobin loses its affinity for oxygen.
E)   None of these choices is correct.F) B) and E)
G) None of the above

Question 14

A decrease in the surface area of the respiratory membrane will cause the diffusion rate to

Accepted Answer

A)   increase.
B)   decrease.
C)   remain unchanged.D) None of the above
E) A) and B)

Question 15

Hemoglobin that has released its oxygen

Accepted Answer

A)   loses its affinity for oxygen.
B)   will dissolve in the plasma.
C)   will bind more readily to carbon dioxide.
D)   is broken down to heme and globin and excreted.
E)   will bind more readily to oxygen.F) A) and D)
G) All of the above

Question 16

-Which of the patients above is suffering from emphysema?

Accepted Answer

The answer of 
-Which of the patients above is suffering...

Question 17

Contraction of respiratory muscles are responsible for the movement of air out of the lungs in quiet expiration.

Accepted Answer

A) True 
 B)False

Question 18

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 19

Apnea is the slowing of respiration as occurs during sleep.

Accepted Answer

A) True 
 B)False

Question 20

The portion of the pharynx that extends from the internal nares to the level of the uvula is the

Accepted Answer

A)   glottis.
B)   nasopharynx.
C)   oropharynx.
D)   laryngopharynx.
E)   glottopharynx.F) B) and D)
G) C) and D)

Exam 23: Respiratory System

All of the following are changes seen in the respiratory system with aging, except

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-Which of the patients above is suffering from emphysema?

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Contraction of respiratory muscles are responsible for the movement of air out of the lungs in quiet expiration.

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When these ligaments or folds come together, they prevent food from entering the lower respiratory tract.

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During exercise, the oxygen-hemoglobin dissociation curve

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Arrange the following structures in the order air passes through them during inhalation: (1) alveolar ducts (2) alveolus (3) respiratory bronchiole (4) terminal bronchiole

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Rhythmicity of breathing involves

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A decrease in the surface area of the respiratory membrane will cause the diffusion rate to

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Apnea is the slowing of respiration as occurs during sleep.

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Mr. Smith hypoventilates and retains too much carbon dioxide. Which of the following receptors is stimulated by an increase in carbon dioxide?

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Which of the following is NOT a function of the respiratory system?

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The chemosensitive area of the brain is located in the

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Use the following key to determine the best answer. -(1) PO2 in alveolar air; (2) PO2 in venous blood

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The olfactory epithelium responsible for the sense of smell is located in the

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The walls of the alveoli

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As acidity increases, how does this affect the affinity of hemoglobin for the oxygen it carries?

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The portion of the pharynx that extends from the internal nares to the level of the uvula is the

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The Bohr effect refers to the

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Hemoglobin that has released its oxygen

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

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Use the following key to determine the best answer. -(1) PO₂ in alveolar air; (2) PO₂ in venous blood

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