Question 1

Which structure is lined with simple squamous epithelium?

Accepted Answer

A)  oropharynx
B)  alveolus
C)  trachea
D)  nasopharynxE) A) and B)
F) All of the above

Question 2

The parietal pleura lines the thoracic wall.

Accepted Answer

A) True 
 B)False

Question 3

Which of the choices below is NOT a role of the pleurae?

Accepted Answer

A)  allow the lungs to easily glide easily over the thorax wall during breathing movements
B)  assist in blood flow to and from the heart because the heart sits between the lungs
C)  help limit the spread of local infections
D)  help divide the thoracic cavity into three chambersE) B) and C)
F) A) and D)

Question 4

The walls of the alveoli are composed of two types of cells,type I and type II alveolar cells.The function of type II alveolar cells is to ________.

Accepted Answer

A)  replace mucus in the alveoli
B)  protect the lungs from bacterial invasion
C)  trap dust and other debris
D)  secrete surfactantE) B) and D)
F) C) and D)

Question 5

Select the correct statement about the pharynx.

Accepted Answer

A)  The pharyngeal tonsil is located in the laryngopharynx.
B)  The palatine tonsils are embedded in the lateral walls of the nasopharynx.
C)  The laryngopharynx blends posteriorly into the nasopharynx.
D)  The pharyngotympanic (auditory) tube drains into the nasopharynx.E) C) and D)
F) None of the above

Question 6

Smoking diminishes ciliary action and eventually destroys the cilia.

Accepted Answer

A) True 
 B)False

Question 7

According to the oxygen-hemoglobin dissociation curve,PO2 in the lungs of 100 mm Hg results in Hb being 98% saturated.At high altitude,there is less O2.At a PO2 in the lungs of 80 mm Hg,Hb would be ________ saturated.

Accepted Answer

A)  98%
B)  less than 50%
C)  100%
D)  95%E) B) and C)
F) None of the above

Question 8

Which of the following is NOT a stimulus for breathing?

Accepted Answer

A)  rising blood pressure
B)  arterial PO2 below 60 mm Hg
C)  acidosis resulting from CO2 retention
D)  rising carbon dioxide levelsE) B) and D)
F) All of the above

Question 9

Intrapleural pressure is normally about 4 mm Hg less than the pressure in the alveoli.

Accepted Answer

A) True 
 B)False

Question 10

During normal quiet breathing,approximately 750 ml of air moves into and out of the lungs with each breath.

Accepted Answer

A) True 
 B)False

Question 11

Factors that influence the rate and depth of breathing include ________.

Accepted Answer

A)  stretch receptors in the alveoli
B)  temperature of alveolar air
C)  voluntary cortical control
D)  thalamic controlE) A) and B)
F) A) and C)

Question 12

Inspiratory capacity is ________.

Accepted Answer

A)  air inspired after a tidal inhalation
B)  functional residual capacity
C)  the total amount of exchangeable air
D)  the total amount of air that can be inspired after a tidal expirationE) C) and D)
F) A) and B)

Question 13

After a long scuba diving session on a Caribbean reef,Carl boards a plane to Dallas.He begins to feel pain in his elbow on the flight back to Dallas.What is happening to him?

Accepted Answer

Carl is experiencing decompression sickn...

Question 14

The amount of air that can be inspired above the tidal volume is called ________.

Accepted Answer

A)  inspiratory reserve volume
B)  vital capacity
C)  reserve air
D)  expiratory capacityE) A) and B)
F) C) and D)

Question 15

Oxygenated hemoglobin releases oxygen more readily when the pH is more basic.

Accepted Answer

A) True 
 B)False

Question 16

The inflation (Hering-Breuer)reflex is a potentially dangerous response that may cause overinflation of the lung.

Accepted Answer

A) True 
 B)False

Question 17

Complete the following statement using the choices below.Air moves out of the lungs when the pressure inside the lungs is ________.

Accepted Answer

A)  equal to the pressure in the atmosphere
B)  less than the pressure in the atmosphere
C)  greater than the intra-alveolar pressure
D)  greater than the pressure in the atmosphereE) B) and C)
F) None of the above

Question 18

The local matching of blood flow with ventilation is ________.

Accepted Answer

A)  ventilation-perfusion coupling
B)  the Bohr effect
C)  the Haldane effect
D)  chloride shiftingE) A) and B)
F) None of the above

Question 19

Infant respiratory distress syndrome (IRDS)is a condition peculiar to premature babies.In IRDS insufficient surfactant is produced.What does this cause and how is it treated?

Accepted Answer

Too little surfactant results in increas...

Question 20

Nasal conchae mainly work on inhalation to warm and moisten air.They serve minor functions for exhalation.

Accepted Answer

A) True 
 B)False

Exam 22: The Respiratory System

During normal quiet breathing,approximately 750 ml of air moves into and out of the lungs with each breath.

Correct AnswerverifiedShow Answer

The amount of air that can be inspired above the tidal volume is called ________.

Correct AnswerverifiedShow Answer

Select the correct statement about the pharynx.

Correct AnswerverifiedShow Answer

According to the oxygen-hemoglobin dissociation curve,PO2 in the lungs of 100 mm Hg results in Hb being 98% saturated.At high altitude,there is less O2.At a PO2 in the lungs of 80 mm Hg,Hb would be ________ saturated.

Correct AnswerverifiedShow Answer

Factors that influence the rate and depth of breathing include ________.

Correct AnswerverifiedShow Answer

Smoking diminishes ciliary action and eventually destroys the cilia.

Correct AnswerverifiedShow Answer

Infant respiratory distress syndrome (IRDS)is a condition peculiar to premature babies.In IRDS insufficient surfactant is produced.What does this cause and how is it treated?

Correct AnswerverifiedToo little surfactant results in increas...View AnswerShow Answer

Complete the following statement using the choices below.Air moves out of the lungs when the pressure inside the lungs is ________.

Correct AnswerverifiedShow Answer

Which of the following is NOT a stimulus for breathing?

Correct AnswerverifiedShow Answer

Inspiratory capacity is ________.

Correct AnswerverifiedShow Answer

Nasal conchae mainly work on inhalation to warm and moisten air.They serve minor functions for exhalation.

Correct AnswerverifiedShow Answer

The parietal pleura lines the thoracic wall.

Correct AnswerverifiedShow Answer

Oxygenated hemoglobin releases oxygen more readily when the pH is more basic.

Correct AnswerverifiedShow Answer

The walls of the alveoli are composed of two types of cells,type I and type II alveolar cells.The function of type II alveolar cells is to ________.

Correct AnswerverifiedShow Answer

The inflation (Hering-Breuer)reflex is a potentially dangerous response that may cause overinflation of the lung.

Correct AnswerverifiedShow Answer

After a long scuba diving session on a Caribbean reef,Carl boards a plane to Dallas.He begins to feel pain in his elbow on the flight back to Dallas.What is happening to him?

Correct AnswerverifiedCarl is experiencing decompression sickn...View AnswerShow Answer

The local matching of blood flow with ventilation is ________.

Correct AnswerverifiedShow Answer

Which of the choices below is NOT a role of the pleurae?

Correct AnswerverifiedShow Answer

Intrapleural pressure is normally about 4 mm Hg less than the pressure in the alveoli.

Correct AnswerverifiedShow Answer

Which structure is lined with simple squamous epithelium?

Correct AnswerverifiedShow Answer

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Too little surfactant results in increas...
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Carl is experiencing decompression sickn...
View Answer

Correct Answer
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Correct Answer
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