Question 1

If a patient inhales as deeply as possible and then exhales as much as possible,the volume of air expelled would be the patient's

Accepted Answer

A)  tidal volume.
B)  inspiratory reserve volume.
C)  expiratory reserve volume.
D)  reserve volume.
E)  vital capacity.

Question 2

Figure 23-2 Mechanics of Ventilation
Use Figure 23-2 to answer the following questions:
-Which muscle(s) contract(s) to cause the movement indicated by the arrows labeled "6" and "7"?

Accepted Answer

A)  rectus abdominis
B)  internal intercostals
C)  external intercostals
D)  diaphragm
E)  both rectus abdominis and internal intercostals

Question 3

The function of pulmonary ventilation is to

Accepted Answer

A)  remove carbon dioxide from the blood.
B)  supply oxygen to the blood.
C)  maintain adequate alveolar ventilation.
D)  remove air from dead air space.
E)  prevent gas exchange in the bronchioles.

Question 4

Damage to the type II pneumocytes of the lungs would result in

Accepted Answer

A)  a loss of surfactant.
B)  an increased rate of gas exchange.
C)  decreased surface tension in the alveoli.
D)  expansion of alveoli.
E)  All of the answers are correct.

Question 5

The pneumotaxic center of the pons

Accepted Answer

A)  sets the at-rest respiratory pattern.
B)  prolongs inspiration.
C)  modifies the rate and depth of breathing.
D)  suppresses the expiratory center in the medulla.
E)  stimulates the dorsal respiratory group.

Question 6

Harry suffers from cystic fibrosis and has severe breathing difficulties.His problems result from

Accepted Answer

A)  genetic mutation in cilia production.
B)  laryngospasms.
C)  thick secretions that are difficult to transport.
D)  lack of neural control of respiration.
E)  reduced mucus secretions in the trachea.

Question 7

Low pH alters hemoglobin structure so that oxygen binds less strongly to hemoglobin at low PO₂.This increases the effectiveness of

Accepted Answer

A)  external respiration.
B)  internal respiration.
C)  carbon dioxide transport.
D)  hemoglobin synthesis.
E)  acid-base balance.

Question 8

Dalton's law of gases relates to

Accepted Answer

A)  partial pressure of a gas in a mixture of gases.
B)  temperature and pressure of gases.
C)  solubility of gases.
D)  gas pressure and saturation of hemoglobin.
E)  volume and gas pressure.

Question 9

Respiratory function deteriorates as a result of pneumonia because inflammation

Accepted Answer

A)  causes fluids to leak into the alveoli.
B)  causes respiratory bronchioles to swell and dilate.
C)  causes the lungs to leak air into the thorax.
D)  reduces movement of the epiglottis.
E)  reduces the size of the pleural cavity.

Question 10

The movement of chloride ions into the RBCs in exchange for bicarbonate ions is known as the chloride

Accepted Answer

A)  trade.
B)  shift.
C)  exchange.
D)  swap.
E)  transport.

Question 11

An acute infection of the throat that can lead to swelling and closure of the glottis and cause suffocation is known as

Accepted Answer

A)  laryngitis.
B)  laryngospasm.
C)  acute epiglottitis.
D)  strep throat.
E)  acute pharyngitis.

Question 12

Each of the following factors affects the rate of external respiration except the

Accepted Answer

A)  PO₂ of the alveoli.
B)  PCO₂ of the blood.
C)  thickness of the respiratory membrane.
D)  PN₂ of the alveoli.
E)  solubility of oxygen in plasma.

Question 13

P inside C) P outside  
Figure 23-2 Mechanics of Ventilation
Use Figure 23-2 to answer the following questions:
-What is the relationship between the pressures at label "3"?

Accepted Answer

A)  P outside = P inside
B)  P outside > P inside
C)  P outside 
D)  P outside + P inside
E)  P outside - P inside

Question 14

Prolonged inspirations can result from stimulating the ________ center.

Accepted Answer

A)  apneustic
B)  pneumotaxic
C)  expiratory
D)  baroreceptor
E)  chemoreceptor

Question 15

The actual sites of gas exchange within the lungs are the

Accepted Answer

A)  bronchioles.
B)  terminal bronchioles.
C)  spaces between the parietal and visceral pleura.
D)  respiratory membranes of the alveoli.
E)  interlobular septa.

Question 16

Figure 23-2 Mechanics of Ventilation
Use Figure 23-2 to answer the following questions:
-How does the pressure "P4" at label "4" compare to the pressure "P5" at label "5"?

Accepted Answer

A)  P4 is higher than P5 during inhalation and then lower during exhalation.
B)  P4 is always higher than P5.
C)  P4 is always lower than P5.
D)  P4 always equals P5.
E)  P4 is lower than P5 during inhalation and then higher during exhalation.

Question 17

Breathing that involves active inspiratory and expiratory movements is called

Accepted Answer

A)  eupnea.
B)  hyperpnea.
C)  diaphragmatic breathing.
D)  costal breathing.
E)  shallow breathing.

Question 18

The number of lobes in the right lung is

Accepted Answer

A)  greater than the number of lobes in the left lung.
B)  less than the number of lobes in the left lung.
C)  equal to the number of lobes in the left lung.

Question 19

The superior region of the pharynx is called the

Accepted Answer

A)  nasal cavity.
B)  nasopharynx.
C)  oropharynx.
D)  laryngopharynx.
E)  superior nasal conchae.

Question 20

Which of the following is not a function of the nasal mucosa?

Accepted Answer

A)  warming the incoming air
B)  trapping particulate matter
C)  dehumidifying the incoming air
D)  cooling outgoing air
E)  None of the answers is correct; all of these are functions of the nasal mucosa.

Exam 23: The Respiratory System

Breathing that involves active inspiratory and expiratory movements is called

Correct AnswerverifiedShow Answer

Harry suffers from cystic fibrosis and has severe breathing difficulties.His problems result from

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Each of the following factors affects the rate of external respiration except the

Correct AnswerverifiedShow Answer

Figure 23-2 Mechanics of Ventilation Use Figure 23-2 to answer the following questions: -Which muscle(s) contract(s) to cause the movement indicated by the arrows labeled "6" and "7"?

Correct AnswerverifiedShow Answer

Which of the following is not a function of the nasal mucosa?

Correct AnswerverifiedShow Answer

Figure 23-2 Mechanics of Ventilation Use Figure 23-2 to answer the following questions: -What is the relationship between the pressures at label "3"?

Correct AnswerverifiedShow Answer

The number of lobes in the right lung is

Correct AnswerverifiedShow Answer

Dalton's law of gases relates to

Correct AnswerverifiedShow Answer

If a patient inhales as deeply as possible and then exhales as much as possible,the volume of air expelled would be the patient's

Correct AnswerverifiedShow Answer

Figure 23-2 Mechanics of Ventilation Use Figure 23-2 to answer the following questions: -How does the pressure "P4" at label "4" compare to the pressure "P5" at label "5"?

Correct AnswerverifiedShow Answer

The superior region of the pharynx is called the

Correct AnswerverifiedShow Answer

The movement of chloride ions into the RBCs in exchange for bicarbonate ions is known as the chloride

Correct AnswerverifiedShow Answer

Damage to the type II pneumocytes of the lungs would result in

Correct AnswerverifiedShow Answer

The pneumotaxic center of the pons

Correct AnswerverifiedShow Answer

Respiratory function deteriorates as a result of pneumonia because inflammation

Correct AnswerverifiedShow Answer

The function of pulmonary ventilation is to

Correct AnswerverifiedShow Answer

An acute infection of the throat that can lead to swelling and closure of the glottis and cause suffocation is known as

Correct AnswerverifiedShow Answer

Low pH alters hemoglobin structure so that oxygen binds less strongly to hemoglobin at low PO₂.This increases the effectiveness of

Correct AnswerverifiedShow Answer

The actual sites of gas exchange within the lungs are the

Correct AnswerverifiedShow Answer

Prolonged inspirations can result from stimulating the ________ center.

Correct AnswerverifiedShow Answer

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