Question 1

In addition to oxygen, hemoglobin also transports

Accepted Answer

A)   carbonic acid and bicarbonate ions.
B)   calcium and carbon dioxide.
C)   carbon dioxide and hydrogen ions.
D)   iron and albumin.E) None of the above
F) A) and C)

Question 2

The lungs remain inflated because

Accepted Answer

A)   intrapulmonary pressure is less than intrapleural pressure.
B)   intrapleural pressure is less than intrapulmonary pressure.
C)   intrapleural pressure is exactly equal to intrapulmonary pressure.
D)   intrapleural pressure is exactly equal to atmospheric pressure.E) None of the above
F) A) and C)

Question 3

Which is not a function of the respiratory system?

Accepted Answer

A)   Sound reception
B)   Gas exchange
C)   Odor detection
D)   Air passageE) All of the above
F) A) and B)

Question 4

From moment to moment, the oxygen partial pressure gradient between systemic capillary blood and systemic cells switches: one moment it favors diffusion toward the blood and the next moment it favors diffusion toward the cells.

Accepted Answer

A) True 
 B)False

Question 5

Gross & microscopic anatomy of the respiratory tract & related organs. 
-In these views of the trachea, what structure does number 1 indicate?

Accepted Answer

A)   Trachealis muscle
B)   Thyroid cartilage
C)   Cricoid cartilage
D)   Annular ligament
E)   Tracheal cartilageF) A) and E)
G) All of the above

Question 6

Organize the items listed into the proper sequence of events for gas exchange.
A: O2 is transported to cells by circulatory system.
B: O2 is drawn into the lungs during inhalation.
C: Cells use O2 and generate CO2.
D: CO2 is exhaled.
E: The circulatory system transports CO2 to the lungs.

Accepted Answer

A)   a, b, c, d, e
B)   b, a, c, d, e
C)   b, a, c, e, d
D)   c, e, d, a, b
E)   e, d, c, b, aF) A) and E)
G) C) and D)

Question 7

Several things happen to inhaled air in a process called conditioning. Select the exception.

Accepted Answer

A)   The air is cooled.
B)   The air is humidified.
C)   The air is cleansed.
D)   The air is moistened.
E)   The air becomes turbulent.F) B) and C)
G) B) and E)

Question 8

The main function of serous fluid is to

Accepted Answer

A)   lubricate and reduce friction between pleural membranes around the lung.
B)   improve adhesion of the lungs to the thoracic wall.
C)   facilitate the diffusion of oxygen across the respiratory membrane.D) A) and C)
E) A) and B)

Question 9

The larynx is supported by nine pieces of cartilage. Which cartilages occur in pairs?

Accepted Answer

A)   Thyroid and corniculate
B)   Corniculate and cricoid
C)   Cricoid, corniculate, and arytenoid
D)   Corniculate, cuneiform, and arytenoid
E)   Arytenoid and epiglottisF) C) and E)
G) A) and C)

Question 10

When someone exercises vigorously, their breathing is described as demonstrating

Accepted Answer

A)   hyperpnea, involving deeper but not faster breathing.
B)   hyperventilation, involving both deeper and faster breathing.
C)   bradypnea, involving deeper and slower breathing.
D)   hypopnea, involving shallower but faster breathing.E) All of the above
F) C) and D)

Question 11

Histamine release results in increased airway resistance and decreased airflow.

Accepted Answer

A) True 
 B)False

Question 12

In a situation where one small bronchus is obstructed, the air in that segment of the lung will develop a high partial pressure of carbon dioxide and a low partial pressure of oxygen. What changes in ventilation and perfusion will occur in that segment in response to this condition?

Accepted Answer

The changes in gas p...

Question 13

Each lung consists of a number of segments called

Accepted Answer

A)   alveolar segments.
B)   bronchopulmonary segments.
C)   mesothelial segments.
D)   pleural segments.
E)   systemic segments.F) D) and E)
G) A) and B)

Question 14

Which statement accurately describes alveolar and systemic gas exchanges?

Accepted Answer

A)   In both alveolar and systemic gas exchange, oxygen diffuses out of the blood.
B)   In both alveolar and systemic gas exchange, oxygen diffuses toward the blood.
C)   In alveolar gas exchange oxygen diffuses into the blood, but in systemic gas exchange it diffuses out of the blood.
D)   In alveolar gas exchange oxygen diffuses out of the blood, but in systemic gas exchange it diffuses into the blood.E) All of the above
F) B) and D)

Question 15

Gross & microscopic anatomy of the respiratory tract & related organs. 
-In this closeup image of a lung, what structure does number 3 indicate?

Accepted Answer

A)   Respiratory bronchiole
B)   Alveolar duct
C)   Alveolus
D)   Terminal bronchiole
E)   BronchioleF) A) and E)
G) D) and E)

Question 16

About 70% of the CO2 that diffuses into systemic capillaries

Accepted Answer

A)   directly dissolves in the plasma.
B)   combines with water to form carbonic acid, which then dissociates into bicarbonate and hydrogen ions.
C)   binds to hemoglobin.
D)   forms carbonic anhydrase, which combines carbonic acid and water to solubilize the CO2.E) B) and C)
F) B) and D)

Question 17

Foreign particles that are not filtered out by the respiratory epithelium are

Accepted Answer

A)   dissolved by enzymes in the alveoli.
B)   coughed up during normal daily activities.
C)   collected by lymph nodes.
D)   carried away in blood.
E)   stored in nearby pulmonary alcoves.F) A) and D)
G) C) and D)

Question 18

What changes in the blood levels of respiratory gases result from hyperventilation?

Accepted Answer

A)   Oxygen and carbon dioxide levels rise.
B)   Oxygen and carbon dioxide levels fall.
C)   Oxygen levels rise and carbon dioxide levels fall.
D)   Oxygen levels do not change but carbon dioxide levels fall.E) B) and D)
F) A) and B)

Question 19

Hyperventilation leads to hypercapnia.

Accepted Answer

A) True 
 B)False

Question 20

The main stimulus that drives increased breathing during exercise is a drop in blood levels of oxygen.

Accepted Answer

A) True 
 B)False

Exam 23: Respiratory System

Hyperventilation leads to hypercapnia.

Correct AnswerverifiedShow Answer

Organize the items listed into the proper sequence of events for gas exchange. A: O2 is transported to cells by circulatory system. B: O2 is drawn into the lungs during inhalation. C: Cells use O2 and generate CO2. D: CO2 is exhaled. E: The circulatory system transports CO2 to the lungs.

Correct AnswerverifiedShow Answer

Which statement accurately describes alveolar and systemic gas exchanges?

Correct AnswerverifiedShow Answer

Histamine release results in increased airway resistance and decreased airflow.

Correct AnswerverifiedShow Answer

Which is not a function of the respiratory system?

Correct AnswerverifiedShow Answer

The lungs remain inflated because

Correct AnswerverifiedShow Answer

Foreign particles that are not filtered out by the respiratory epithelium are

Correct AnswerverifiedShow Answer

Each lung consists of a number of segments called

Correct AnswerverifiedShow Answer

The main stimulus that drives increased breathing during exercise is a drop in blood levels of oxygen.

Correct AnswerverifiedShow Answer

The larynx is supported by nine pieces of cartilage. Which cartilages occur in pairs?

Correct AnswerverifiedShow Answer

The main function of serous fluid is to

Correct AnswerverifiedShow Answer

What changes in the blood levels of respiratory gases result from hyperventilation?

Correct AnswerverifiedShow Answer

When someone exercises vigorously, their breathing is described as demonstrating

Correct AnswerverifiedShow Answer

Gross & microscopic anatomy of the respiratory tract & related organs. -In this closeup image of a lung, what structure does number 3 indicate?

Correct AnswerverifiedShow Answer

In a situation where one small bronchus is obstructed, the air in that segment of the lung will develop a high partial pressure of carbon dioxide and a low partial pressure of oxygen. What changes in ventilation and perfusion will occur in that segment in response to this condition?

Correct AnswerverifiedThe changes in gas p...View AnswerShow Answer

In addition to oxygen, hemoglobin also transports

Correct AnswerverifiedShow Answer

About 70% of the CO2 that diffuses into systemic capillaries

Correct AnswerverifiedShow Answer

From moment to moment, the oxygen partial pressure gradient between systemic capillary blood and systemic cells switches: one moment it favors diffusion toward the blood and the next moment it favors diffusion toward the cells.

Correct AnswerverifiedShow Answer

Several things happen to inhaled air in a process called conditioning. Select the exception.

Correct AnswerverifiedShow Answer

Gross & microscopic anatomy of the respiratory tract & related organs. -In these views of the trachea, what structure does number 1 indicate?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Organize the items listed into the proper sequence of events for gas exchange. A: O₂ is transported to cells by circulatory system. B: O₂ is drawn into the lungs during inhalation. C: Cells use O₂ and generate CO_2. D: CO₂ is exhaled. E: The circulatory system transports CO₂ to the lungs.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The changes in gas p...
View Answer

Correct Answer
verified

About 70% of the CO₂ that diffuses into systemic capillaries

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified