Question 1

The nasal septum

Accepted Answer

A)   divides the nose into superior and inferior chambers.
B)   forms the floor of the nasal cavity.
C)   is the opening of the nose to the outside environment.
D)   is the part of the nose responsible for the sense of smell.
E)   divides the nose into right and left chambers.F) D) and E)
G) B) and E)

Question 2

The ________ zone extends from the trachea to the terminal bronchioles.

Accepted Answer

The answer of The ________ zone extends from the trachea...

Question 3

Which of the following events in the chloride shift occurs last?

Accepted Answer

A)   Carbon dioxide diffuses into a red blood cell.
B)   Carbonic acid dissociates to form bicarbonate and H+.
C)   Bicarbonate ions diffuse into the plasma.
D)   CO2 and H2O → H2CO3
E)   Carbonic acid dissociates to form water and CO2.F) D) and E)
G) B) and D)

Question 4

When CO2 levels in the blood increase, the

Accepted Answer

A)   condition is called hypocapnia.
B)   pH of the blood increases.
C)   blood becomes more acidic.
D)   number of hydrogen ions in the blood decreases.
E)   blood becomes more alkaline.F) B) and D)
G) A) and C)

Question 5

Which of the following results in an increase in shunted blood (blood not completely oxygenated) ?

Accepted Answer

A)   Exercise
B)   Pulmonary edema
C)   Increased heart rate
D)   Increased respiration rate
E)   None of the choices are correct.F) A) and D)
G) B) and D)

Question 6

Two opposing mechanisms determine alveolar expansion: ________ leads to alveolar expansion, while ________ opposes alveolar expansion.

Accepted Answer

A)   lung recoil; positive pleural pressure
B)   positive pleural pressure; lung recoil
C)   lung recoil; negative pleural pressure
D)   negative pleural pressure; lung recoilE) C) and D)
F) A) and D)

Question 7

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 dead space.
D)   decreased inspiratory reserve volume.
E)   decreased lung compliance.F) A) and C)
G) A) and B)

Question 8

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 B)
G) None of the above

Question 9

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

Accepted Answer

A)   increase
B)   decrease
C)   remain unchangedD) A) and B)
E) None of the above

Question 10

The Haldane effect means that

Accepted Answer

A)   as hemoglobin releases CO2, the ability to pick up O2 increases.
B)   as hemoglobin releases bicarbonate ions, the ability to pick up chloride ions increases.
C)   as hemoglobin releases O2, the ability to pick up CO2 increases.
D)   as hemoglobin releases O2, the ability to pick up CO2 decreases.E) All of the above
F) None of the above

Question 11

Oxygen is transported in the blood

Accepted Answer

A)   bound to hemoglobin.
B)   bound to albumin.
C)   dissolved in the plasma.
D)   as part of the bicarbonate ion.
E)   dissolved in the plasma and bound to hemoglobin.F) A) and D)
G) C) and D)

Question 12

The major regulator of respiration is the plasma concentration of ________.

Accepted Answer

A)   oxygen
B)   carbon dioxide
C)   water vapor
D)   nitrogen
E)   chlorideF) C) and D)
G) A) and E)

Question 13

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 HgF) B) and D)
G) B) and E)

Question 14

Which of the following factors keeps the alveoli expanded?

Accepted Answer

A)   A pneumothorax
B)   Negative pleural pressure
C)   Alveolar pressure being equal to atmospheric pressure
D)   A reduction in surfactant
E)   Negative intra-alveolar pressureF) A) and C)
G) All of the above

Question 15

Contraction of the ________ muscles will elevate the ribs and move the sternum.

Accepted Answer

external i...

Question 16

Match the term with the appropriate description. Answer with the letter preceding the description.
-Internal nares

Accepted Answer

A)  The floor of the nasal cavity
B)  Superior portion of pharynx
C)  A soft process that extends inferiorly from the posterior edge of the soft palate
D)  The opening of the nasal cavity into the pharynx
E)  External openings of the nasal cavityF) All of the above
G) C) and D)

Question 17

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 E)
G) C) and D)

Question 18

The ring of cartilage that forms the base of the larynx is the ________.

Accepted Answer

A)   epiglottis
B)   thyroid cartilage
C)   cricoid cartilage
D)   arytenoid cartilage
E)   cuneiform cartilageF) B) and E)
G) A) and C)

Question 19

________ is the volume of air inspired during a normal inspiration.

Accepted Answer

The answer of ________ is the volume of air inspired...

Question 20

Match the term with the appropriate description or definition.
-Tidal volume

Accepted Answer

A)  Sum of the inspiratory reserve, expiratory reserve, tidal, and residual volumes
B)  Volume of air inspired during a normal inspiration
C)  Volume of air remaining in lungs after the most forceful expiration
D)  Sum of the expiratory reserve, inspiratory reserve, and tidal volumes
E)  The amount of air that can be forcefully expired after expiration of the normal tidal volumeF) A) and E)
G) C) and D)

Exam 23: Respiratory System

The Haldane effect means that

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________ is the volume of air inspired during a normal inspiration.

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

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When CO2 levels in the blood increase, the

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The ________ zone extends from the trachea to the terminal bronchioles.

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Match the term with the appropriate description or definition. -Tidal volume

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The nasal septum

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

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The major regulator of respiration is the plasma concentration of ________.

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Which of the following events in the chloride shift occurs last?

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Oxygen is transported in the blood

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Contraction of the ________ muscles will elevate the ribs and move the sternum.

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Two opposing mechanisms determine alveolar expansion: ________ leads to alveolar expansion, while ________ opposes alveolar expansion.

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

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Match the term with the appropriate description. Answer with the letter preceding the description. -Internal nares

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Which of the following results in an increase in shunted blood (blood not completely oxygenated) ?

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Rhythmicity of breathing involves

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Which of the following factors keeps the alveoli expanded?

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The ring of cartilage that forms the base of the larynx is the ________.

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When CO₂ levels in the blood increase, the

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external i...
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Two opposing mechanisms determine alveolar expansion: leads to alveolar expansion, while opposes alveolar expansion.

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