Question 1

The pneumotaxic center and apneustic center are located within the

Accepted Answer

A)  aortic bodies.
B)  alveoli.
C)  pons.
D)  spinal cord.

Question 2

The olfactory receptors

Accepted Answer

A)  are located on the tongue.
B)  are located within the nasal cavities and nasal septum.
C)  are also called taste buds.
D)  carry sensory information to the brain via CN II.

Question 3

How is most oxygen transported through the blood?

Accepted Answer

A)  attached to hemoglobin.
B)  as bicarbonate.
C)  as a surfactant.
D)  as a lysozyme.

Question 4

Oxygen diffuses from the alveoli into the

Accepted Answer

A)  bronchioles.
B)  trachea.
C)  pulmonary capillaries.
D)  eustachian tube.

Question 5

Which of the following best describes eupnea?

Accepted Answer

A)  Kussmaul respirations
B)  Vital capacity
C)  Normal,quiet breathing
D)  Hypoxemia

Question 6

The diaphragm

Accepted Answer

A)  is the chief muscle of inhalation.
B)  is innervated by the phrenic nerve.
C)  increases thoracic volume when contracted.
D)  All of the above are true.

Question 7

Firing of the intercostal and phrenic nerves

Accepted Answer

A)  activates the respiratory control center in the medulla oblongata.
B)  causes relaxation of the muscles of respiration.
C)  causes a skeletal muscle response that increases thoracic volume.
D)  dilates the bronchioles.

Question 8

Frontal,maxillary,sphenoidal,and ethmoidal

Accepted Answer

A)  refer to the bones of the thorax.
B)  are saliva-secreting glands.
C)  are paranasal sinuses.
D)  are lined with serous membrane.

Question 9

Activation of the beta₂-adrenergic receptors of the airway

Accepted Answer

A)  causes laryngospasm.
B)  constricts the bronchioles.
C)  restricts air flow.
D)  causes bronchodilation.

Question 10

The respiratory passages are lined with

Accepted Answer

A)  pleura.
B)  mucous membrane.
C)  serous membrane.
D)  muscle.

Question 11

A preterm infant is most likely to develop respiratory distress because of

Accepted Answer

A)  bacterial pneumonia.
B)  a deficiency of surfactant.
C)  excess mucus in the upper airways.
D)  an inability of the immature diaphragm to contract.

Question 12

Laryngospasm and epiglottal swelling is most apt to cause

Accepted Answer

A)  pulmonary edema.
B)  upper airway obstruction.
C)  pleural effusion.
D)  pneumothorax.

Question 13

Which of the following is necessary for the lungs to remain expanded?

Accepted Answer

A)  The alveolar cells must secrete surfactant.
B)  The intrapulmonic pressure must be negative.
C)  The glottis must be closed.
D)  The intrapleural pressure must be negative.

Question 14

The nares,nostrils,and nasal septum

Accepted Answer

A)  are concerned with gas exchange.
B)  are located in the upper respiratory tract.
C)  contain gustatory organs.
D)  are parts of the bronchial tree.

Question 15

The epiglottis,glottis,and vocal cords

Accepted Answer

A)  vibrate on exhalation,causing sound.
B)  prevent the entrance of food and water into the respiratory passages.
C)  are structures of the larynx.
D)  are composed of tough cartilage.

Question 16

Which of the following occurs on inhalation?

Accepted Answer

A)  Air moves into the intrapulmonic space.
B)  Thoracic volume increases.
C)  The diaphragm contracts.
D)  All of the above occur.

Question 17

Which of the following is most likely to cause hypoxemia?

Accepted Answer

A)  Kussmaul respirations
B)  Hyperventilation
C)  Medullary depression
D)  Brain stem stimulation

Question 18

Which of the following are the accessory muscles of respiration (used in forced exhalation) ?

Accepted Answer

A)  Intercostals and diaphragm
B)  Sternocleidomastoid and trapezius
C)  Internal intercostals and the abdominal muscles
D)  Pectoralis major and serratus anterior

Question 19

The pleural membranes

Accepted Answer

A)  line the respiratory passages.
B)  form the bronchioles.
C)  are serous membranes.
D)  are confined to the mediastinum.

Question 20

Which of the following is the first step in inhalation?

Accepted Answer

A)  Phrenic nerve stimulation
B)  Activation of the NM receptors (neuromuscular junction of the phrenic nerve and diaphragm) 
C)  Firing of the medullary inspiratory neurons
D)  Contraction of the diaphragm

Exam 22: Respiratory System

How is most oxygen transported through the blood?

Correct AnswerverifiedShow Answer

Which of the following is the first step in inhalation?

Correct AnswerverifiedShow Answer

The nares,nostrils,and nasal septum

Correct AnswerverifiedShow Answer

The pleural membranes

Correct AnswerverifiedShow Answer

Which of the following are the accessory muscles of respiration (used in forced exhalation) ?

Correct AnswerverifiedShow Answer

The olfactory receptors

Correct AnswerverifiedShow Answer

Laryngospasm and epiglottal swelling is most apt to cause

Correct AnswerverifiedShow Answer

The pneumotaxic center and apneustic center are located within the

Correct AnswerverifiedShow Answer

The epiglottis,glottis,and vocal cords

Correct AnswerverifiedShow Answer

Activation of the beta₂-adrenergic receptors of the airway

Correct AnswerverifiedShow Answer

Which of the following best describes eupnea?

Correct AnswerverifiedShow Answer

The diaphragm

Correct AnswerverifiedShow Answer

Firing of the intercostal and phrenic nerves

Correct AnswerverifiedShow Answer

Frontal,maxillary,sphenoidal,and ethmoidal

Correct AnswerverifiedShow Answer

Which of the following is most likely to cause hypoxemia?

Correct AnswerverifiedShow Answer

Which of the following occurs on inhalation?

Correct AnswerverifiedShow Answer

Which of the following is necessary for the lungs to remain expanded?

Correct AnswerverifiedShow Answer

A preterm infant is most likely to develop respiratory distress because of

Correct AnswerverifiedShow Answer

The respiratory passages are lined with

Correct AnswerverifiedShow Answer

Oxygen diffuses from the alveoli into the

Correct AnswerverifiedShow Answer

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