Question 1

From largest to smallest, the correct sequence for the following passageways is

Accepted Answer

A)   bronchi, bronchioles, respiratory bronchioles, terminal bronchioles, alveoli.
B)   bronchioles, terminal bronchioles, respiratory bronchioles, bronchi, alveoli.
C)   alveoli, bronchioles, terminal bronchioles, respiratory bronchioles, bronchi.
D)   bronchi, bronchioles, terminal bronchioles, respiratory bronchioles, alveoli.
E)   terminal bronchioles, respiratory bronchioles, bronchi, bronchioles, alveoli.F) B) and E)
G) C) and D)

Question 2

The serous membranes that surround the lungs are called the

Accepted Answer

A)   mucous membranes.
B)   synovial membranes.
C)   pleural membranes.
D)   peritoneal membranes.
E)   pulmonary membranes.F) None of the above
G) A) and C)

Question 3

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

Question 4

As temperature increases, how would this affect the oxyhemoglobin-dissociation curve?

Accepted Answer

A)   shift it to the left
B)   shift it to the right
C)   no change
D)   shift it up
E)   None of these choices is correctF) B) and C)
G) A) and C)

Question 5

Explain why the PO2 of the blood leaving pulmonary capillaries is 104 mm Hg, but the blood leaving the lungs to enter the left atrium is 95 mm Hg.

Accepted Answer

A)   Some oxygen diffuses out of the blood as it travels through the pulmonary veins
B)   Some oxygen is incorporated into bicarbonate ion, removing it from solution and reducing PO2
C)   Some carbon dioxide in the alveoli is mixed with oxygenated blood from alveolar circulation
D)   Deoxygenated blood from bronchial circulation is mixed with blood from oxygenated alveolar circulationE) B) and C)
F) None of the above

Question 6

Most carbon dioxide is transported in the blood

Accepted Answer

A)   in the form of bicarbonate ions.
B)   bound to hemoglobin.
C)   dissolved in the plasma.
D)   by the leukocytes.
E)   in the form of carbonic acid.F) D) and E)
G) A) and C)

Question 7

The respiratory zone of the tracheobronchial tree includes which of the following?

Accepted Answer

A)   trachea
B)   alveoli
C)   primary bronchi
D)   larynx
E)   tertiary bronchiF) All of the above
G) C) and D)

Question 8

What type of cells make up about 90% of the alveolar surface?

Accepted Answer

A)   ciliated simple squamous epithelial cells
B)   Type I pneumocytes
C)   Type II pneumocytes
D)   macrophagesE) A) and C)
F) A) and B)

Question 9

The highest level of exercise that can be performed without causing a significant change in blood pH is called the

Accepted Answer

A)   Hering-Breuer reflex.
B)   aerobic threshold.
C)   anaerobic threshold.
D)   lactic acid tolerance level.E) All of the above
F) A) and B)

Question 10

Match the term with the appropriate description or definition.
-expiratory reserve volume
"Enter the letter of the correct description below"

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 E)
G) A) and E)

Question 11

Match the term with the appropriate description, answer with the letter preceding the description.
-uvula
"Enter the letter of the correct description below"

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

Question 12

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 Hg.F) C) and D)
G) A) and D)

Question 13

The diameter of bronchioles can change because their walls contain

Accepted Answer

A)   smooth muscle.
B)   skeletal muscle.
C)   fibrous cartilage.
D)   hyaline cartilage.
E)   elastic cartilage.F) C) and D)
G) B) and E)

Question 14

Air in the pleural cavity is called

Accepted Answer

A)   emphysema.
B)   respiratory distress syndrome.
C)   a pneumothorax.
D)   pneumonia.
E)   forced expiration.F) A) and B)
G) A) and C)

Question 15

Use the following two choices.
-decrease blood pH

Accepted Answer

A)  oxygen-hemoglobin dissociation curve shifts to the right
B)  oxygen-hemoglobin dissociation curve shifts to the leftC) A) and B)
D) undefined

Question 16

What type of alveolar cells produce surfactant?

Accepted Answer

A)   ciliated simple cuboidal epithelial cells
B)   Type I pneumocytes
C)   Type II pneumocytes
D)   macrophagesE) A) and B)
F) C) and D)

Question 17

Each lobe of each lung is supplied by a

Accepted Answer

A)   primary bronchus.
B)   secondary bronchus.
C)   tertiary bronchus.
D)   bronchiole.
E)   segmental bronchus.F) A) and E)
G) B) and E)

Question 18

Pulmonary edema will cause the rate of gas diffusion to

Accepted Answer

A)   increase.
B)   decrease.
C)   remain the same.D) A) and B)
E) A) and C)

Question 19

Which of the following structures opens directly into the nasal cavity?

Accepted Answer

A)   paranasal sinuses
B)   auditory tubes
C)   lacrimal glands
D)   fauces
E)   epiglottisF) C) and D)
G) B) and C)

Question 20

The pontine respiratory neurons

Accepted Answer

A)   are located in the medulla oblongata in the brain.
B)   are active only during inspiration.
C)   are active only during expiration.
D)   play a role in switching between inspiration and expiration.
E)   is essential for respiratory rhythm.F) None of the above
G) All of the above

Exam 23: Respiratory System

Air in the pleural cavity is called

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From largest to smallest, the correct sequence for the following passageways is

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As temperature increases, how would this affect the oxyhemoglobin-dissociation curve?

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Each lobe of each lung is supplied by a

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Which of the following structures opens directly into the nasal cavity?

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What type of alveolar cells produce surfactant?

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What type of cells make up about 90% of the alveolar surface?

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Match the term with the appropriate description, answer with the letter preceding the description. -uvula "Enter the letter of the correct description below"

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Most carbon dioxide is transported in the blood

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Pulmonary edema will cause the rate of gas diffusion to

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The diameter of bronchioles can change because their walls contain

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The pontine respiratory neurons

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The serous membranes that surround the lungs are called the

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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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The respiratory zone of the tracheobronchial tree includes which of the following?

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The highest level of exercise that can be performed without causing a significant change in blood pH is called the

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

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Use the following two choices. -decrease blood pH

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Match the term with the appropriate description or definition. -expiratory reserve volume "Enter the letter of the correct description below"

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Explain why the PO2 of the blood leaving pulmonary capillaries is 104 mm Hg, but the blood leaving the lungs to enter the left atrium is 95 mm Hg.

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

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Explain why the P_O2 of the blood leaving pulmonary capillaries is 104 mm Hg, but the blood leaving the lungs to enter the left atrium is 95 mm Hg.

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