Question 1

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. 
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 2

This 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 3

Anatomic dead air space is most associated with this structure.

Accepted Answer

A)  frontal sinus 
B)  alveoli 
C)  trachea 
D)  esophagus 
A)  frontal sinus 
B)  alveoli 
C)  trachea 
D)  esophagus

Question 4

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 5

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 6

This 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 7

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 8

The trachea is

Accepted Answer

A)  "the problem" in asthma. 
B)  the site of gas exchange. 
C)  composed primarily of smooth muscle. 
D)  a large airway that splits into two bronchi. 
A)  "the problem" in asthma. 
B)  the site of gas exchange. 
C)  composed primarily of smooth muscle. 
D)  a large airway that splits into two bronchi.

Question 9

In reference to a normally expanded lung,the

Accepted Answer

A)  intrapulmonic pressure is less than intrapleural pressure. 
B)  intrapleural pressure is greater than atmospheric pressure. 
C)  intrapulmonic pressure is greater than intrapleural pressure. 
D)  intrapleural,intrapulmonic,and atmospheric pressures are equal. 
A)  intrapulmonic pressure is less than intrapleural pressure. 
B)  intrapleural pressure is greater than atmospheric pressure. 
C)  intrapulmonic pressure is greater than intrapleural pressure. 
D)  intrapleural,intrapulmonic,and atmospheric pressures are equal.

Question 10

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 11

Which group is incorrect?

Accepted Answer

A)  pulmonary volumes:tidal,inspiratory reserve,expiratory reserve 
B)  structures of the bronchial tree:bronchi,bronchioles,alveoli 
C)  respiratory gases:oxygen and carbon dioxide 
D)  parts of the pharynx:oro-,naso-,laryngo-,bronchio- 
A)  pulmonary volumes:tidal,inspiratory reserve,expiratory reserve 
B)  structures of the bronchial tree:bronchi,bronchioles,alveoli 
C)  respiratory gases:oxygen and carbon dioxide 
D)  parts of the pharynx:oro-,naso-,laryngo-,bronchio-

Question 12

Oxygen diffuses from the alveoli into the

Accepted Answer

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

Question 13

Which of the following is most likely to cause hypoxia?

Accepted Answer

A)  Kussmaul respirations 
B)  hyperventilation 
C)  medullary depression 
D)  brain stem stimulation 
A)  Kussmaul respirations 
B)  hyperventilation 
C)  medullary depression 
D)  brain stem stimulation

Question 14

As plasma PCO2 increases,

Accepted Answer

A)  hemoglobin synthesis increases. 
B)  ventilation increases. 
C)  vital capacity increases. 
D)  respirations cease. 
A)  hemoglobin synthesis increases. 
B)  ventilation increases. 
C)  vital capacity increases. 
D)  respirations cease.

Question 15

This structure is called the windpipe and is supported by rings of cartilage.

Accepted Answer

A)  bronchus 
B)  alveolus 
C)  pharynx 
D)  trachea 
A)  bronchus 
B)  alveolus 
C)  pharynx 
D)  trachea

Question 16

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 17

Contraction of the diaphragm and the 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 18

Which of the following best describes eupnea?

Accepted Answer

A)  Kussmaul respirations 
B)  vital capacity 
C)  normal,quiet breathing 
D)  hypoxemia 
A)  Kussmaul respirations 
B)  vital capacity 
C)  normal,quiet breathing 
D)  hypoxemia

Question 19

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. 
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 20

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

Exam 22: Respiratory System

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

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

Anatomic dead air space is most associated with this structure.

The trachea branches into the right and left

When the diaphragm and the intercostal muscles relax,

This nerve innervates the diaphragm.

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

The trachea is

In reference to a normally expanded lung,the

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

Which group is incorrect?

Oxygen diffuses from the alveoli into the

Which of the following is most likely to cause hypoxia?

As plasma PCO2 increases,

This structure is called the windpipe and is supported by rings of cartilage.

What is the effect of curare?

Contraction of the diaphragm and the intercostal muscles

Which of the following best describes eupnea?

The nares,nostrils,and nasal septum

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

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

As plasma PCO₂ increases,