Question 1

Which of the following are the accessory muscles of respiration (used in forced exhalation)?

Accepted Answer

A) Intercostals and diaphragm 
B) Sternocleidomastoid and trapezius 
C) Internal intercostals and the abdominal muscles 
D) Pectoralis major and serratus anterior 
A) Intercostals and diaphragm 
B) Sternocleidomastoid and trapezius 
C) Internal intercostals and the abdominal muscles 
D) Pectoralis major and serratus anterior

Question 2

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 3

Firing of the intercostal and phrenic nerves

Accepted Answer

A) activates the respiratory control center in the medulla oblongata. 
B) causes relaxation of the muscles of respiration. 
C) causes a skeletal muscle response that increases thoracic volume. 
D) dilates the bronchioles. 
A) activates the respiratory control center in the medulla oblongata. 
B) causes relaxation of the muscles of respiration. 
C) causes a skeletal muscle response that increases thoracic volume. 
D) dilates the bronchioles.

Question 4

Which of the following is the first step in inhalation?

Accepted Answer

A) Phrenic nerve stimulation 
B) Activation of the NM receptors (neuromuscular junction of the phrenic nerve and diaphragm) 
C) Firing of the medullary inspiratory neurons 
D) Contraction of the diaphragm 
A) Phrenic nerve stimulation 
B) Activation of the NM receptors (neuromuscular junction of the phrenic nerve and diaphragm) 
C) Firing of the medullary inspiratory neurons 
D) Contraction of the diaphragm

Question 5

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 6

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.

Question 7

The epiglottis,glottis,and vocal cords

Accepted Answer

A) vibrate on exhalation,causing sound. 
B) prevent the entrance of food and water into the respiratory passages. 
C) are structures of the larynx. 
D) are composed of tough cartilage. 
A) vibrate on exhalation,causing sound. 
B) prevent the entrance of food and water into the respiratory passages. 
C) are structures of the larynx. 
D) are composed of tough cartilage.

Question 8

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 9

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 10

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 11

The respiratory passages are lined with

Accepted Answer

A) pleura. 
B) mucous membrane. 
C) serous membrane. 
D) muscle. 
A) pleura. 
B) mucous membrane. 
C) serous membrane. 
D) muscle.

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

Which of the following occurs on inhalation?

Accepted Answer

A) Air moves into the intrapulmonic space. 
B) Thoracic volume increases. 
C) The diaphragm contracts. 
D) All of the above occur. 
A) Air moves into the intrapulmonic space. 
B) Thoracic volume increases. 
C) The diaphragm contracts. 
D) All of the above occur.

Question 14

Frontal,maxillary,sphenoidal,and ethmoidal

Accepted Answer

A) refer to the bones of the thorax. 
B) are saliva-secreting glands. 
C) are paranasal sinuses. 
D) are lined with serous membrane. 
A) refer to the bones of the thorax. 
B) are saliva-secreting glands. 
C) are paranasal sinuses. 
D) are lined with serous membrane.

Question 15

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 16

The pneumotaxic center and apneustic center are located within the

Accepted Answer

A) aortic bodies. 
B) alveoli. 
C) pons. 
D) spinal cord. 
A) aortic bodies. 
B) alveoli. 
C) pons. 
D) spinal cord.

Question 17

Which of the following is most likely to cause hypoxemia?

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 18

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 19

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 20

A preterm infant is most likely to develop respiratory distress because of

Accepted Answer

A) bacterial pneumonia. 
B) a deficiency of surfactant. 
C) excess mucus in the upper airways. 
D) an inability of the immature diaphragm to contract. 
A) bacterial pneumonia. 
B) a deficiency of surfactant. 
C) excess mucus in the upper airways. 
D) an inability of the immature diaphragm to contract.

Exam 22: Respiratory System

Which of the following are the accessory muscles of respiration (used in forced exhalation)?

Activation of the beta₂-adrenergic receptors of the airway

Firing of the intercostal and phrenic nerves

Which of the following is the first step in inhalation?

Oxygen diffuses from the alveoli into the

How is most oxygen transported through the blood?

The epiglottis,glottis,and vocal cords

The olfactory receptors

The nares,nostrils,and nasal septum

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

The respiratory passages are lined with

Laryngospasm and epiglottal swelling is most apt to cause

Which of the following occurs on inhalation?

Frontal,maxillary,sphenoidal,and ethmoidal

The pleural membranes

The pneumotaxic center and apneustic center are located within the

Which of the following is most likely to cause hypoxemia?

The diaphragm

Which of the following best describes eupnea?

A preterm infant is most likely to develop respiratory distress because 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 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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