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

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 
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 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 
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

Boyle's law states the relationship between volume and

Accepted Answer

A)  O2. 
B)  CO2. 
C)  pressure. 
D)  H2O. 
A)  O2. 
B)  CO2. 
C)  pressure. 
D)  H2O.

Question 5

Which of the following respiratory tubes are primarily composed of smooth muscle and determine the flow of air to the alveoli?

Accepted Answer

A)  Trachea 
B)  Bronchi 
C)  Bronchioles 
D)  Nares 
A)  Trachea 
B)  Bronchi 
C)  Bronchioles 
D)  Nares

Question 6

Surfactants

Accepted Answer

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

Question 7

Identify the names of the following: voice box,throat,and windpipe.

Accepted Answer

A)  Larynx, vocal cords, trachea 
B)  Larynx, laryngopharynx, bronchi 
C)  Larynx, pharynx, trachea 
D)  Laryngopharynx, pharynx, alveoli 
A)  Larynx, vocal cords, trachea 
B)  Larynx, laryngopharynx, bronchi 
C)  Larynx, pharynx, trachea 
D)  Laryngopharynx, pharynx, alveoli

Question 8

Which of the following is a structure located within the lungs?

Accepted Answer

A)  Visceral pleura 
B)  Primary bronchi 
C)  Parietal pleura 
D)  Intrapleural space 
A)  Visceral pleura 
B)  Primary bronchi 
C)  Parietal pleura 
D)  Intrapleural space

Question 9

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. 
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 10

Which of the following statements is true of the right bronchus?

Accepted Answer

A)  Food and small objects are more likely to be aspirated into the right bronchus because it is more vertical and larger than the left bronchus. 
B)  The right bronchus has an opening to the pleural cavity. 
C)  Oxygen content is higher in the right bronchus than the left bronchus. 
D)  The right bronchus is bigger than the left bronchus, so it has higher levels of carbon dioxide. 
A)  Food and small objects are more likely to be aspirated into the right bronchus because it is more vertical and larger than the left bronchus. 
B)  The right bronchus has an opening to the pleural cavity. 
C)  Oxygen content is higher in the right bronchus than the left bronchus. 
D)  The right bronchus is bigger than the left bronchus, so it has higher levels of carbon dioxide.

Question 11

A stab wound to the chest causes the lung to collapse because

Accepted Answer

A)  of a sudden increase in surface tension. 
B)  intrapulmonic pressure becomes less than atmospheric pressure. 
C)  intrapulmonic pressure becomes higher than intrapleural pressure. 
D)  intrapleural pressure becomes greater than intrapulmonic pressure. 
A)  of a sudden increase in surface tension. 
B)  intrapulmonic pressure becomes less than atmospheric pressure. 
C)  intrapulmonic pressure becomes higher than intrapleural pressure. 
D)  intrapleural pressure becomes greater than intrapulmonic pressure.

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

Question 13

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. 
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 14

Which of the following describes Boyle's law?

Accepted Answer

A)  An increase in thoracic volume causes an increase in intrapulmonic pressure. 
B)  There is no relationship between intrapulmonic pressure and thoracic volume. 
C)  An increase in thoracic volume decreases intrapulmonic pressure. 
D)  An increase in thoracic volume forces air out of the lungs. 
A)  An increase in thoracic volume causes an increase in intrapulmonic pressure. 
B)  There is no relationship between intrapulmonic pressure and thoracic volume. 
C)  An increase in thoracic volume decreases intrapulmonic pressure. 
D)  An increase in thoracic volume forces air out of the lungs.

Question 15

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. 
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 16

Most CO₂ is transported in the blood

Accepted Answer

A)  by the hemoglobin, as carbaminohemoglobin. 
B)  by megakaryocytes. 
C)  loosely bound to the iron molecule in heme. 
D)  as bicarbonate. 
A)  by the hemoglobin, as carbaminohemoglobin. 
B)  by megakaryocytes. 
C)  loosely bound to the iron molecule in heme. 
D)  as bicarbonate.

Question 17

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

Question 18

Contraction and relaxation of the diaphragm and intercostal muscles

Accepted Answer

A)  change thoracic volume. 
B)  close the glottis. 
C)  occur in response to firing of the vagus nerve. 
D)  All of the above are true. 
A)  change thoracic volume. 
B)  close the glottis. 
C)  occur in response to firing of the vagus nerve. 
D)  All of the above are true.

Question 19

The water molecule is polar,meaning that each end of the molecule has an electrical charge.Because of this characteristic,water

Accepted Answer

A)  has a high surface tension. 
B)  can only dissolve lipids. 
C)  is a poor solvent. 
D)  is lipid-soluble. 
A)  has a high surface tension. 
B)  can only dissolve lipids. 
C)  is a poor solvent. 
D)  is lipid-soluble.

Question 20

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

Exam 22: Respiratory System

What happens when the diaphragm and the intercostal muscles relax?

What is the effect of curare?

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

Boyle's law states the relationship between volume and

Which of the following respiratory tubes are primarily composed of smooth muscle and determine the flow of air to the alveoli?

Surfactants

Identify the names of the following: voice box,throat,and windpipe.

Which of the following is a structure located within the lungs?

The trachea

Which of the following statements is true of the right bronchus?

A stab wound to the chest causes the lung to collapse because

Laryngospasm and epiglottal swelling is most apt to cause

The olfactory receptors

Which of the following describes Boyle's law?

The diaphragm

Most CO₂ is transported in the blood

Activation of the beta₂-adrenergic receptors of the airway

Contraction and relaxation of the diaphragm and intercostal muscles

The water molecule is polar,meaning that each end of the molecule has an electrical charge.Because of this characteristic,water

How is most oxygen transported through the blood?

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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