Question 1

List,in order,the structures of the respiratory membrane that carbon dioxide must cross to move from the blood into an air sac of the lung.

Accepted Answer

The carbon dioxide must pass through the pulmonary capillary endothelium,then the fused basement membrane,then the squamous cell of the alveolar wall.

Question 2

-Which sinus does the number 1 indicate

Accepted Answer

A)  Frontal sinus
B)  Anterior sinus
C)  Ethmoidal sinus
D)  Maxillary sinus
E)  Sphenoidal sinus

Question 3

Bronchial arteries carry _________ blood to the tissues of the lung.

Accepted Answer

A)  oxygenated
B)  deoxygenated

Question 4

The pulmonary plexus is a weblike network of nerve fibers that surrounds the primary bronchi and enters the lungs at the hilum.It consists of both sympathetic and parasympathetic fibers.

Accepted Answer

A) True 
 B)False

Question 5

The alveolar cell that secretes pulmonary surfactant is the

Accepted Answer

A)  alveolar type II cell.
B)  alveolar type I cell.
C)  alveolar macrophage.
D)  dust cell.
E)  squamous alveolar cell.

Question 6

Which type of receptor initiates the inhalation (or Hering-Breuer) reflex

Accepted Answer

A)  Central chemoreceptors
B)  Baroreceptors
C)  Peripheral chemoreceptors
D)  Proprioceptors

Question 7

Relaxation of the smooth muscle within the walls of bronchioles leads to _______________.

Accepted Answer

bronchodilation

Question 8

Compared to its partial pressure at sea level,what would be the partial pressure of oxygen at an altitude with an atmospheric pressure of only 380 mm Hg (recall that sea level atmospheric pressure is 760 mm Hg)

Accepted Answer

A)  Po2would be half as much as it would be at sea level.
B)  Po2would be twice as much as it would be at sea level.
C)  Po2would be one-fourth as much as it would be at sea level.
D)  Po2would be three-quarters as much as it would be at sea level.

Question 9

The bronchial circulation is a component of the pulmonary circulation.

Accepted Answer

A) True 
 B)False

Question 10

The main function of serous fluid is to

Accepted Answer

A)  lubricate and reduce friction between pleural membranes around the lung.
B)  improve adhesion of the lungs to the thoracic wall.
C)  facilitate the diffusion of oxygen across the respiratory membrane.

Question 11

Which statement is true regarding the location of the trachea

Accepted Answer

A)  It lies superior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs.
B)  It lies posterior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs.
C)  It lies anterior to the esophagus,inferior to the larynx,and inferior to the primary bronchi of the lungs.
D)  It lies anterior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs.
E)  It lies superior to the esophagus,superior to the larynx,and superior to the primary bronchi of the lungs.

Question 12

Bronchoconstriction results from relaxation of smooth muscle in the walls of airways.

Accepted Answer

A) True 
 B)False

Question 13

Activation of sympathetic nerves that innervate lung tissue results in

Accepted Answer

A)  bronchoconstriction.
B)  bronchodilation.

Question 14

These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation.

Accepted Answer

A)  External intercostals
B)  Scalenes
C)  Transversus thoracis
D)  Internal intercostals
E)  Serratus posterior inferior

Question 15

When blood passes through systemic capillaries,the oxygen saturation of hemoglobin changes

Accepted Answer

A)  from about 98% to about 75% saturated.
B)  from about 40% to about 80% saturated.
C)  from about 70% saturated to about 99% saturated.
D)  from about 99% saturated to about 25% saturated. A

Question 16

The depth and rate of respiration influence blood levels of hydrogen ion.

Accepted Answer

A) True 
 B)False

Question 17

The amount of air left in the lungs even after the most forceful expiration is referred to as the _________ volume.

Accepted Answer

The answer of The amount of air left in the...

Question 18

An actively contracting muscle will cause local temperature to rise and will produce acidic molecules.Warmth and lower pH cause the oxygen-hemoglobin saturation curve to shift ______ reflecting that hemoglobin releases ______ oxygen.

Accepted Answer

A)  left;more
B)  left;less
C)  right;more
D)  right;less

Question 19

Consistent with Boyle's law,air flows from a region of lower pressure (the atmosphere)into a region of higher pressure within the lungs.

Accepted Answer

A) True 
 B)False

Question 20

Also known as the pneumotaxic center,this area allows for smooth transitions between inspiration and expiration.

Accepted Answer

A)  Dorsal respiratory group
B)  Ventral respiratory group
C)  Pontine respiratory center
D)  Medullary respiratory center
E)  Carotid body

Exam 23: Respiratory System

List,in order,the structures of the respiratory membrane that carbon dioxide must cross to move from the blood into an air sac of the lung.

Correct AnswerverifiedThe carbon dioxide must pass through the pulmonary capillary endothelium,then the fused basement membrane,then the squamous cell of the alveolar wall.

-Which sinus does the number 1 indicate

Correct AnswerverifiedShow Answer

Bronchial arteries carry _________ blood to the tissues of the lung.

Correct AnswerverifiedShow Answer

The pulmonary plexus is a weblike network of nerve fibers that surrounds the primary bronchi and enters the lungs at the hilum.It consists of both sympathetic and parasympathetic fibers.

Correct AnswerverifiedShow Answer

The alveolar cell that secretes pulmonary surfactant is the

Correct AnswerverifiedShow Answer

Which type of receptor initiates the inhalation (or Hering-Breuer) reflex

Correct AnswerverifiedShow Answer

Relaxation of the smooth muscle within the walls of bronchioles leads to _______________.

Correct Answerverifiedbronchodilation

Compared to its partial pressure at sea level,what would be the partial pressure of oxygen at an altitude with an atmospheric pressure of only 380 mm Hg (recall that sea level atmospheric pressure is 760 mm Hg)

Correct AnswerverifiedShow Answer

The bronchial circulation is a component of the pulmonary circulation.

Correct AnswerverifiedShow Answer

The main function of serous fluid is to

Correct AnswerverifiedShow Answer

Which statement is true regarding the location of the trachea

Correct AnswerverifiedShow Answer

Bronchoconstriction results from relaxation of smooth muscle in the walls of airways.

Correct AnswerverifiedShow Answer

Activation of sympathetic nerves that innervate lung tissue results in

Correct AnswerverifiedShow Answer

These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation.

Correct AnswerverifiedShow Answer

When blood passes through systemic capillaries,the oxygen saturation of hemoglobin changes

Correct AnswerverifiedA

The depth and rate of respiration influence blood levels of hydrogen ion.

Correct AnswerverifiedShow Answer

The amount of air left in the lungs even after the most forceful expiration is referred to as the _________ volume.

Correct AnswerverifiedShow Answer

An actively contracting muscle will cause local temperature to rise and will produce acidic molecules.Warmth and lower pH cause the oxygen-hemoglobin saturation curve to shift ______ reflecting that hemoglobin releases ______ oxygen.

Correct AnswerverifiedShow Answer

Consistent with Boyle's law,air flows from a region of lower pressure (the atmosphere)into a region of higher pressure within the lungs.

Correct AnswerverifiedShow Answer

Also known as the pneumotaxic center,this area allows for smooth transitions between inspiration and expiration.

Correct AnswerverifiedShow Answer

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The carbon dioxide must pass through the pulmonary capillary endothelium,then the fused basement membrane,then the squamous cell of the alveolar wall.

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bronchodilation

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A

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An actively contracting muscle will cause local temperature to rise and will produce acidic molecules.Warmth and lower pH cause the oxygen-hemoglobin saturation curve to shift reflecting that hemoglobin releases oxygen.

Correct Answer
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