Question 1

What happens when the diaphragm and the intercostal muscles relax?

Accepted Answer

A) air moves out of the lungs. 
B) inhalation occurs. 
C) ventilation ceases. 
D) chest volume increases. 
A) air moves out of the lungs. 
B) inhalation occurs. 
C) ventilation ceases. 
D) chest volume increases.

Question 2

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 3

Which of the following is the dome-shaped muscle that is the chief muscle of inhalation?

Accepted Answer

A) Diaphragm 
B) Epiglottis 
C) Mediastinum 
D) Pericardium 
A) Diaphragm 
B) Epiglottis 
C) Mediastinum 
D) Pericardium

Question 4

Which of the following represents a correct air flow?

Accepted Answer

A) Bronchus to trachea to bronchioles 
B) Trachea to bronchioles to alveoli 
C) Bronchi to bronchioles to alveoli 
D) Nasopharynx to larynx to bronchioles to bronchi 
A) Bronchus to trachea to bronchioles 
B) Trachea to bronchioles to alveoli 
C) Bronchi to bronchioles to alveoli 
D) Nasopharynx to larynx to bronchioles to bronchi

Question 5

Respirations are primarily controlled by the

Accepted Answer

A) medulla oblongata. 
B) cerebellum. 
C) spinal cord. 
D) frontal lobe. 
A) medulla oblongata. 
B) cerebellum. 
C) spinal cord. 
D) frontal lobe.

Question 6

Laryngospasm is most likely to cause

Accepted Answer

A) emphysema. 
B) pneumothorax. 
C) acute respiratory obstruction. 
D) asthma. 
A) emphysema. 
B) pneumothorax. 
C) acute respiratory obstruction. 
D) asthma.

Question 7

A tracheostomy is performed in order to

Accepted Answer

A) ensure an open airway. 
B) humidify inhaled air. 
C) administer high dose oxygen into the laryngopharynx. 
D) introduce food and water into the esophagus and stomach. 
A) ensure an open airway. 
B) humidify inhaled air. 
C) administer high dose oxygen into the laryngopharynx. 
D) introduce food and water into the esophagus and stomach.

Question 8

Pleural membranes

Accepted Answer

A) line the inside of the lungs. 
B) secrete surfactants. 
C) secrete mucus and other viscous secretions to minimize friction between the pleural membranes. 
D) are serous membranes. 
A) line the inside of the lungs. 
B) secrete surfactants. 
C) secrete mucus and other viscous secretions to minimize friction between the pleural membranes. 
D) are serous membranes.

Question 9

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 10

What is the transport mechanism necessary for the movement of oxygen from the alveoli across the pulmonary capillary membranes into the blood?

Accepted Answer

A) Osmosis 
B) Filtration 
C) Diffusion 
D) Active transport pump 
A) Osmosis 
B) Filtration 
C) Diffusion 
D) Active transport pump

Question 11

Surfactants

Accepted Answer

A) are secreted by cells within the alveoli. 
B) increase surface tension. 
C) transport oxygen across the alveolar-pulmonary capillary membrane. 
D) relax the epiglottis so as prevent upper respiratory obstruction. 
A) are secreted by cells within the alveoli. 
B) increase surface tension. 
C) transport oxygen across the alveolar-pulmonary capillary membrane. 
D) relax the epiglottis so as prevent upper respiratory obstruction.

Question 12

Which nerve innervates the diaphragm?

Accepted Answer

A) Intercostal nerve 
B) Sciatic 
C) Phrenic 
D) Cranial nerve XI 
A) Intercostal nerve 
B) Sciatic 
C) Phrenic 
D) Cranial nerve XI

Question 13

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 14

The trachea branches into the right and left

Accepted Answer

A) alveoli. 
B) bronchi. 
C) nares. 
D) pulmonary arteries. 
A) alveoli. 
B) bronchi. 
C) nares. 
D) pulmonary arteries.

Question 15

Which of the following is most likely to stimulate coughing that may be accompanied by a life-threatening bradycardia?

Accepted Answer

A) Suctioning of the lower airways 
B) Administration of albuterol (a Beta₂-adrenergic agonist) via inhalation 
C) Administration of O₂ via nasal cannula 
D) Performance of a thoracentesis 
A) Suctioning of the lower airways 
B) Administration of albuterol (a Beta₂-adrenergic agonist) via inhalation 
C) Administration of O₂ via nasal cannula 
D) Performance of a thoracentesis

Question 16

What is the effect of phrenic nerve stimulation?

Accepted Answer

A) Expiration 
B) Relaxation of the diaphragm and the intercostals 
C) Inhalation 
D) A decrease in chest diameter 
A) Expiration 
B) Relaxation of the diaphragm and the intercostals 
C) Inhalation 
D) A decrease in chest diameter

Question 17

Intra-alveolar surface tension is caused by

Accepted Answer

A) acid. 
B) mucus. 
C) water. 
D) bicarbonate. 
A) acid. 
B) mucus. 
C) water. 
D) bicarbonate.

Exam 22: Respiratory System

What happens when the diaphragm and the intercostal muscles relax?

Which structure has the thinnest wall?

Which of the following is the dome-shaped muscle that is the chief muscle of inhalation?

Which of the following represents a correct air flow?

Respirations are primarily controlled by the

Laryngospasm is most likely to cause

A tracheostomy is performed in order to

Pleural membranes

Bronchiolar constriction is most likely to cause

What is the transport mechanism necessary for the movement of oxygen from the alveoli across the pulmonary capillary membranes into the blood?

Surfactants

Which nerve innervates the diaphragm?

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

The trachea branches into the right and left

Which of the following is most likely to stimulate coughing that may be accompanied by a life-threatening bradycardia?

What is the effect of phrenic nerve stimulation?

Intra-alveolar surface tension is caused by

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 and Special Circulations

Functions of the Blood Vessels

Lymphatic System

Immune System

Digestive System

Urinary System

Water, Electrolyte, and Acidbase Balance

Reproductive Systems

Human Development and Heredity

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