Question 1

The respiratory tract

Accepted Answer

A)  includes the mouth,pharynx,trachea,and esophagus.
B)  contains conductance,resistance,and exchange structures.
C)  is lined with serous pleural membranes and cilia.
D)  begins with the nose and mouth and ends at the bronchioles.

Question 2

Inspiratory and expiratory neurons

Accepted Answer

A)  are located within the respiratory control center in the brain stem.
B)  are sensitive primarily to PO₂.
C)  line the breathing tubes,especially the bronchioles.
D)  All of the above are true.

Question 3

Which of the following is most related to the relaxation of the diaphragm and the intercostal muscles?

Accepted Answer

A)  Results from the firing of the inspiratory neurons
B)  Caused by the firing of the phrenic and intercostal nerves
C)  Decreased thoracic volume
D)  Causes air to move into the lungs

Question 4

Surfactants

Accepted Answer

A)  prevent collapse of the alveoli.
B)  induce anaphylaxis.
C)  cause upper respiratory obstruction.
D)  decrease thoracic volume.

Question 5

The lungs contain the

Accepted Answer

A)  inspiratory and expiratory neurons.
B)  structures of the bronchial tree.
C)  pharynx,larynx,and trachea.
D)  pleural membranes.

Question 6

The phrenic nerve fires.Which event occurs next?

Accepted Answer

A)  The inspiratory neurons fire.
B)  The diaphragm contracts.
C)  Air moves into the lungs.
D)  Thoracic volume decreases.

Question 7

The central chemoreceptors are primarily sensitive to blood levels of

Accepted Answer

A)  oxygen.
B)  carbon dioxide and [H+].
C)  sodium.
D)  potassium.

Question 8

The epiglottis

Accepted Answer

A)  is innervated by the phrenic nerve.
B)  prevents air from entering the esophagus.
C)  prevents food from entering the trachea.
D)  is the Adam's apple.

Question 9

Hypoventilation is most apt to

Accepted Answer

A)  increase blood pH.
B)  induce acidosis.
C)  cause ketosis.
D)  cause hyperglycemia.

Question 10

The trachea

Accepted Answer

A)  contains C-shaped cartilaginous rings.
B)  encircles the pulmonary artery,where gas exchange occurs.
C)  is lined with surfactant-secreting cells.
D)  is located within the pleural cavity.

Question 11

"Clubbing" of the fingers is a response to

Accepted Answer

A)  chronic hypoxemia.
B)  CO₂ retention and acidosis.
C)  acute hyperventilation in response to metabolic acidosis.
D)  chronic dry hacking cough.

Question 12

Hyperventilation is most apt to induce

Accepted Answer

A)  alkalosis.
B)  hypoxemia.
C)  a decline in blood pH.
D)  metabolic acidosis.

Question 13

What is the effect of curare?

Accepted Answer

A)  Depresses the inspiratory neurons in the medulla oblongata
B)  Changes the shape of the hemoglobin so that it cannot bind to oxygen
C)  Interferes with the activation of the diaphragm and the intercostal muscles by their motor nerves
D)  Inactivates acetylcholinesterase

Question 14

The Adam's apple is

Accepted Answer

A)  cartilage.
B)  the epiglottis.
C)  the primary site of gas exchange.
D)  the pharynx.

Question 15

Atelectasis

Accepted Answer

A)  decreases the surface area for gas exchange.
B)  causes pneumothorax.
C)  causes acute respiratory obstruction.
D)  is best treated with antibiotics.

Question 16

Which of the following structures controls respirations?

Accepted Answer

A)  Medulla oblongata
B)  Basal ganglia
C)  Postcentral gyrus
D)  Limbic system

Question 17

Which structure is called the windpipe and is supported by rings of cartilage?

Accepted Answer

A)  Bronchus
B)  Alveolus
C)  Pharynx
D)  Trachea

Question 18

Kussmaul respirations

Accepted Answer

A)  cause hypoxemia.
B)  increase PCO₂.
C)  refer to an acidosis-induced increased respiratory activity.
D)  are caused by a decrease in the plasma [H+].

Question 19

Which substance greatly reduces the attractive forces among the water molecules lining the alveoli?

Accepted Answer

A)  Lysozyme
B)  Converting enzyme
C)  Mucus
D)  Surfactant

Question 20

Which of the following represents a correct anatomical sequence?

Accepted Answer

A)  Larynx,laryngopharynx,trachea
B)  Oropharynx,laryngopharynx,larynx
C)  Larynx,pharynx,bronchi
D)  Voicebox,windpipe,alveoli

Exam 22: Respiratory System

Which of the following is most related to the relaxation of the diaphragm and the intercostal muscles?

Correct AnswerverifiedShow Answer

What is the effect of curare?

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Hypoventilation is most apt to

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The central chemoreceptors are primarily sensitive to blood levels of

Correct AnswerverifiedShow Answer

Which structure is called the windpipe and is supported by rings of cartilage?

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The trachea

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The respiratory tract

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Hyperventilation is most apt to induce

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Atelectasis

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The phrenic nerve fires.Which event occurs next?

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Inspiratory and expiratory neurons

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The Adam's apple is

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"Clubbing" of the fingers is a response to

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Which substance greatly reduces the attractive forces among the water molecules lining the alveoli?

Correct AnswerverifiedShow Answer

Which of the following represents a correct anatomical sequence?

Correct AnswerverifiedShow Answer

The epiglottis

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The lungs contain the

Correct AnswerverifiedShow Answer

Surfactants

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Which of the following structures controls respirations?

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Kussmaul respirations

Correct AnswerverifiedShow Answer

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