Question 1

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) C) and D)
G) A) and E)

Question 2

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) D) and E)
G) A) and B)

Question 3

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) A) and C)
G) B) and C)

Question 4

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) A) and B)
G) C) and E)

Question 5

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) C) and D)
G) A) and E)

Question 6

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

Accepted Answer

external i...

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) D) and E)
G) C) and E)

Question 8

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) All of the above
E) A) and B)

Question 9

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) C) and D)
F) A) and B)

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

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) A) and E)
G) B) and C)

Question 13

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

Accepted Answer

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

Question 14

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) None of the above
F) A) and C)

Question 15

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) A) and E)

Question 16

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) All of the above
G) C) and D)

Question 17

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) C) and D)
G) B) and C)

Question 18

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) B) and D)
G) None of the above

Question 19

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) A) and D)
G) A) and E)

Question 20

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) C) and E)
G) B) and E)

Exam 23: Respiratory System

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When CO2 levels in the blood increase, the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Oxygen is transported in the blood

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedexternal i...View AnswerShow Answer

Which of the following factors keeps the alveoli expanded?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Rhythmicity of breathing involves

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The nasal septum

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The Haldane effect means that

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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 ________.

Correct AnswerverifiedShow Answer

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

When CO₂ levels in the blood increase, the

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
external i...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified