Question 1

Which of the following regulates respiratory activity?

Accepted Answer

A)  PO2 
B)  PCO2 
C)  bicarbonate 
D)  albumin 
A)  PO2 
B)  PCO2 
C)  bicarbonate 
D)  albumin B

Question 2

Most oxygen is transported through the blood

Accepted Answer

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

Question 3

Which of the following structures controls respirations?

Accepted Answer

A)  medulla oblongata 
B)  basal ganglia 
C)  postcentral gyrus 
D)  limbic system 
A)  medulla oblongata 
B)  basal ganglia 
C)  postcentral gyrus 
D)  limbic system A

Question 4

Hypoventilation can cause

Accepted Answer

A)  bleeding and hypotension. 
B)  alkalosis and Kussmaul respirations. 
C)  hypoxemia and acidosis. 
D)  hyperglycemia and acidosis. 
A)  bleeding and hypotension. 
B)  alkalosis and Kussmaul respirations. 
C)  hypoxemia and acidosis. 
D)  hyperglycemia and acidosis.

Question 5

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)  due to the firing of the phrenic and intercostal nerves 
C)  decreases thoracic volume 
D)  causes air to move into the lungs 
A)  results from the firing of the inspiratory neurons 
B)  due to the firing of the phrenic and intercostal nerves 
C)  decreases thoracic volume 
D)  causes air to move into the lungs

Question 6

Surfactants are found within the

Accepted Answer

A)  pulmonary capillaries. 
B)  trachea. 
C)  alveoli. 
D)  intrapleural space. 
A)  pulmonary capillaries. 
B)  trachea. 
C)  alveoli. 
D)  intrapleural space.

Question 7

In which structure is the PO2 104 mm Hg?

Accepted Answer

A)  pulmonary artery 
B)  alveolus 
C)  right ventricle 
D)  vena cava 
A)  pulmonary artery 
B)  alveolus 
C)  right ventricle 
D)  vena cava

Question 8

The Hering-Breuer reflex

Accepted Answer

A)  prevents overinflation of the lungs. 
B)  is a chemical reflex;no nerves are involved. 
C)  is important only in disease states. 
D)  is only concerned with sneezing and coughing. 
A)  prevents overinflation of the lungs. 
B)  is a chemical reflex;no nerves are involved. 
C)  is important only in disease states. 
D)  is only concerned with sneezing and coughing.

Question 9

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 10

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 11

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. 
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 12

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

Question 13

These respiratory muscles are located between the ribs.

Accepted Answer

A)  diaphragm 
B)  bronchiolar smooth muscle 
C)  intercostals 
D)  sternocleidomastoids 
A)  diaphragm 
B)  bronchiolar smooth muscle 
C)  intercostals 
D)  sternocleidomastoids

Question 14

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.

Question 15

Which event occurs first?

Accepted Answer

A)  The diaphragm contracts. 
B)  Air moves into the lungs. 
C)  The phrenic nerve fires. 
D)  The inspiratory neurons in the medulla fire. 
A)  The diaphragm contracts. 
B)  Air moves into the lungs. 
C)  The phrenic nerve fires. 
D)  The inspiratory neurons in the medulla fire.

Question 16

Activation of the beta? 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 17

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 18

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 19

Dyspnea means

Accepted Answer

A)  "puffed up" alveoli. 
B)  pneumonia. 
C)  cyanosis. 
D)  difficulty breathing. 
A)  "puffed up" alveoli. 
B)  pneumonia. 
C)  cyanosis. 
D)  difficulty breathing.

Question 20

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

Exam 22: Respiratory System

Which of the following regulates respiratory activity?

Most oxygen is transported through the blood

Which of the following structures controls respirations?

Hypoventilation can cause

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

Surfactants are found within the

In which structure is the PO2 104 mm Hg?

The Hering-Breuer reflex

Boyle's law states the relationship between volume and

Which structure has the thinnest wall?

The epiglottis

The phrenic nerve fires.Which event occurs next?

These respiratory muscles are located between the ribs.

Boyle's law forms the basis of

Which event occurs first?

Activation of the beta? adrenergic receptors of the airway

The pleural membranes

Laryngospasm is most likely to cause

Dyspnea means

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

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

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

Filters

In which structure is the PO₂ 104 mm Hg?