Question 1

Anatomical dead air space is most associated with which structure?

Accepted Answer

A)  Frontal sinus 
B)  Alveoli 
C)  Trachea 
D)  Esophagus 
A)  Frontal sinus 
B)  Alveoli 
C)  Trachea 
D)  Esophagus

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. 
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 respiratory structure is distal to the trachea and proximal to the alveoli?

Accepted Answer

A)  Pharynx 
B)  Larynx 
C)  Bronchus 
D)  Glottis 
A)  Pharynx 
B)  Larynx 
C)  Bronchus 
D)  Glottis

Question 4

Severing the phrenic nerve

Accepted Answer

A)  stops ventilation. 
B)  impairs exhalation but has no effect on inhalation. 
C)  causes hyperventilation and respiratory alkalosis. 
D)  does all of the above. 
A)  stops ventilation. 
B)  impairs exhalation but has no effect on inhalation. 
C)  causes hyperventilation and respiratory alkalosis. 
D)  does all of the above.

Question 5

Because of their smooth muscle content,_____________ are the primary determinants of air flow.

Accepted Answer

A)  trachea 
B)  bronchi 
C)  alveoli 
D)  bronchioles 
A)  trachea 
B)  bronchi 
C)  alveoli 
D)  bronchioles

Question 6

Which structure has the thinnest wall?

Accepted Answer

A)  Trachea 
B)  Bronchi 
C)  Larynx 
D)  Alveoli 
A)  Trachea 
B)  Bronchi 
C)  Larynx 
D)  Alveoli

Question 7

The pleural membranes

Accepted Answer

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

Question 8

Which of the following will cause the intrapulmonic pressure to become less than atmospheric pressure?

Accepted Answer

A)  Relaxation of the respiratory muscles 
B)  Increase in thoracic volume 
C)  Secretion of surfactants 
D)  95% oxygen saturation 
A)  Relaxation of the respiratory muscles 
B)  Increase in thoracic volume 
C)  Secretion of surfactants 
D)  95% oxygen saturation

Question 9

Ventilation

Accepted Answer

A)  refers to the regulation of blood pH by the lungs. 
B)  refers to loading and unloading of oxygen by hemoglobin. 
C)  has two phases: inhalation and exhalation. 
D)  is exclusively responsive to pCO2. 
A)  refers to the regulation of blood pH by the lungs. 
B)  refers to loading and unloading of oxygen by hemoglobin. 
C)  has two phases: inhalation and exhalation. 
D)  is exclusively responsive to pCO2.

Question 10

The diaphragm

Accepted Answer

A)  is smooth muscle that forms the bronchioles. 
B)  is skeletal muscle. 
C)  contracts in response to the firing of the vagus nerve. 
D)  forms the outer lining of the lungs. 
A)  is smooth muscle that forms the bronchioles. 
B)  is skeletal muscle. 
C)  contracts in response to the firing of the vagus nerve. 
D)  forms the outer lining of the lungs.

Question 11

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

Question 12

Contraction of the diaphragm and the external intercostal muscles

Accepted Answer

A)  stimulates the phrenic and intercostal nerves. 
B)  decreases thoracic volume. 
C)  causes air to move out of the lungs. 
D)  is responsible for inhalation. 
A)  stimulates the phrenic and intercostal nerves. 
B)  decreases thoracic volume. 
C)  causes air to move out of the lungs. 
D)  is responsible for inhalation.

Question 13

Bronchiolar constriction is most likely to cause

Accepted Answer

A)  pneumothorax. 
B)  pulmonary edema. 
C)  wheezing. 
D)  laryngitis. 
A)  pneumothorax. 
B)  pulmonary edema. 
C)  wheezing. 
D)  laryngitis.

Question 14

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. 
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 15

Which event occurs in response to an increase in thoracic volume?

Accepted Answer

A)  The respiratory control center is activated. 
B)  Air moves into and through the respiratory passages. 
C)  Intrapleural pressure becomes greater than intrapulmonic pressure. 
D)  Air is exhaled. 
A)  The respiratory control center is activated. 
B)  Air moves into and through the respiratory passages. 
C)  Intrapleural pressure becomes greater than intrapulmonic pressure. 
D)  Air is exhaled.

Question 16

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

Question 17

Which of the following structures prevents entrance of food and water into the respiratory passages?

Accepted Answer

A)  Larynx 
B)  Glottis 
C)  Epiglottis 
D)  Thyroid cartilage 
A)  Larynx 
B)  Glottis 
C)  Epiglottis 
D)  Thyroid cartilage

Question 18

Stimulation of the phrenic and intercostal nerves causes the release of which neurotransmitter into the neuromuscular junction?

Accepted Answer

A)  Adrenaline 
B)  Norepinephrine 
C)  Acetylcholine 
D)  Myosin 
A)  Adrenaline 
B)  Norepinephrine 
C)  Acetylcholine 
D)  Myosin

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

Question 20

Boyle's law forms the basis of

Accepted Answer

A)  ventilation. 
B)  chemical regulation of breathing. 
C)  oxygen transport in the blood. 
D)  carbon dioxide transport in the blood. 
A)  ventilation. 
B)  chemical regulation of breathing. 
C)  oxygen transport in the blood. 
D)  carbon dioxide transport in the blood.

Exam 22: Respiratory System

Anatomical dead air space is most associated with which structure?

Inspiratory and expiratory neurons

Which respiratory structure is distal to the trachea and proximal to the alveoli?

Severing the phrenic nerve

Because of their smooth muscle content,_____________ are the primary determinants of air flow.

Which structure has the thinnest wall?

The pleural membranes

Which of the following will cause the intrapulmonic pressure to become less than atmospheric pressure?

Ventilation

The diaphragm

Atelectasis

Contraction of the diaphragm and the external intercostal muscles

Bronchiolar constriction is most likely to cause

The respiratory tract

Which event occurs in response to an increase in thoracic volume?

The lungs contain the

Which of the following structures prevents entrance of food and water into the respiratory passages?

Stimulation of the phrenic and intercostal nerves causes the release of which neurotransmitter into the neuromuscular junction?

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

Boyle's law forms the basis of

Introduction to the Human Body

Basic Chemistry

Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

Skeletal System

Muscular System

Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

Sensory System

Endocrine System

Blood

Anatomy of the Heart

Function of the Heart

Anatomy of the Blood Vessels

Functions of the Blood Vessels

Lymphatic System

Immune System

Digestive System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

Human Development and Heredity

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