Question 1

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) B) and D)
F) A) and D)

Question 2

Which of the two lungs is larger and wider

Accepted Answer

A)  The left lung
B)  The right lungC) A) and B)
D) undefined

Question 3

-In this close-up image of a lung,what structure does number 1 indicate

Accepted Answer

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

Question 4

When central chemoreceptors detect a drop in the pH of the cerebrospinal fluid,

Accepted Answer

A)  medullary respiratory centers trigger an increase in rate and depth of breathing.
B)  medullary respiratory centers trigger a decrease in rate and depth of breathing.
C)  pontine respiratory centers trigger a decrease in rate and depth of breathing.
D)  the vagus and phrenic nerves stimulate decreased production of the catalyst carbonic anhydrase.E) B) and C)
F) A) and D)

Question 5

What type of tissue lines the trachea

Accepted Answer

A)  Cuboidal epithelium
B)  Simple squamous epithelium
C)  Stratified squamous keratinized epithelium
D)  Stratified squamous nonkeratinized epithelium
E)  Pseudostratified ciliated columnar epitheliumF) C) and D)
G) A) and C)

Question 6

Hemoglobin is crucial for oxygen transport in the blood because oxygen has a _______ solubility coefficient in water.

Accepted Answer

A)  high
B)  lowC) A) and B)
D) undefined

Question 7

You may have noticed that after a large meal you have had some difficulty breathing.Which explanation is most accurate with regard to this situation

Accepted Answer

A)  The food presses on the bronchi,making air flow difficult.
B)  The large quantity of food retards pulmonary blood flow.
C)  Oxygen to the lungs is restricted due to fullness in the stomach.
D)  A full stomach impedes contraction of the diaphragm,limiting inhalation.E) C) and D)
F) B) and D)

Question 8

The anatomic features of the respiratory membrane that make alveolar gas exchange so efficient are

Accepted Answer

A)  the high degree of moisture and the large ratio of volume to surface area.
B)  its large surface area and minimal thickness.
C)  its thinness,high water content,and scarcity of capillaries.
D)  its hearty thickness and the presence of oxygen transport pumps.E) B) and D)
F) A) and C)

Question 9

An air passage (valley) beneath a turbinate within the nasal cavity is referred to as a

Accepted Answer

A)  vestibule.
B)  concha.
C)  vibrissa.
D)  meatus.E) A) and D)
F) A) and C)

Question 10

What structures are used by both the respiratory and digestive systems

Accepted Answer

A)  Oropharynx and laryngopharynx
B)  Laryngopharynx and larynx
C)  Nasal cavity and nasopharynx
D)  Paranasal sinuses
E)  Laryngopharynx and esophagusF) A) and D)
G) A) and C)

Question 11

Which answer places the following events in proper order for pulmonary ventilation
A: Thoracic cavity volume changes.
B: Brainstem nuclei stimulate skeletal muscles to contract.
C: Air flows down its pressure gradient.
D: Dimensional changes in the thorax lead to pressure changes within the lung.

Accepted Answer

A)  b,a,d,c
B)  d,c,b,a
C)  b,d,c,a
D)  a,c,d,b
E)  c,a,d,bF) A) and B)
G) All of the above

Question 12

If someone at sea level is given pure oxygen to breathe,it would cause the oxygen saturation of their hemoglobin

Accepted Answer

A)  to increase by more than double.
B)  to increase by only a tiny amount.
C)  to decrease due to uncooperative binding.D) All of the above
E) B) and C)

Question 13

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) B) and C)
F) A) and D)

Question 14

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) C) and D)
G) A) and E)

Question 15

The terms "upper respiratory system" and "lower respiratory system" are ___________ categorizations of the respiratory system.

Accepted Answer

A)  structural
B)  functional
C)  outdatedD) A) and B)
E) A) and C)

Question 16

Mucin _______ the viscosity of mucus,facilitating the ______ of dust and dirt particles.

Accepted Answer

A)  increases;trapping
B)  decreases;flushing
C)  increases;diluting
D)  decreases;exocytosisE) B) and C)
F) All of the above

Question 17

Approximately what percent of the oxygen in blood is transported by the hemoglobin of erythrocytes

Accepted Answer

A)  33%
B)  50%
C)  66%
D)  75%
E)  98%F) C) and E)
G) B) and E)

Question 18

Histamine release results in increased airway resistance and decreased airflow.

Accepted Answer

A) True 
 B)False

Question 19

Which is not correct about the left lung

Accepted Answer

A)  It is slightly smaller than the right lung.
B)  It has a cardiac impression.
C)  It has a cardiac notch.
D)  It has 2 lobes and 1 fissure.
E)  It has an esophageal depression.F) A) and B)
G) A) and C)

Question 20

Two individuals of the same size (same dead space) have a pulmonary ventilation rate of 6 L/min,but one is breathing 10 breaths/min and the other is breathing 15 breaths/min.How do their alveolar ventilation rates compare

Accepted Answer

A)  The slower breather has a greater alveolar ventilation rate.
B)  The faster breather has a greater alveolar ventilation rate.
C)  Their alveolar ventilation rates are equivalent.D) B) and C)
E) None of the above

Exam 23: Respiratory System

Histamine release results in increased airway resistance and decreased airflow.

Correct AnswerverifiedShow Answer

Which is not correct about the left lung

Correct AnswerverifiedShow Answer

Which answer places the following events in proper order for pulmonary ventilation A: Thoracic cavity volume changes. B: Brainstem nuclei stimulate skeletal muscles to contract. C: Air flows down its pressure gradient. D: Dimensional changes in the thorax lead to pressure changes within the lung.

Correct AnswerverifiedShow Answer

When central chemoreceptors detect a drop in the pH of the cerebrospinal fluid,

Correct AnswerverifiedShow Answer

Approximately what percent of the oxygen in blood is transported by the hemoglobin of erythrocytes

Correct AnswerverifiedShow Answer

If someone at sea level is given pure oxygen to breathe,it would cause the oxygen saturation of their hemoglobin

Correct AnswerverifiedShow Answer

An air passage (valley) beneath a turbinate within the nasal cavity is referred to as a

Correct AnswerverifiedShow Answer

What structures are used by both the respiratory and digestive systems

Correct AnswerverifiedShow Answer

What type of tissue lines the trachea

Correct AnswerverifiedShow Answer

Which statement accurately describes alveolar and systemic gas exchanges

Correct AnswerverifiedShow Answer

Which of the two lungs is larger and wider

Correct AnswerverifiedShow Answer

Each lung consists of a number of segments called

Correct AnswerverifiedShow Answer

Hemoglobin is crucial for oxygen transport in the blood because oxygen has a _______ solubility coefficient in water.

Correct AnswerverifiedShow Answer

The anatomic features of the respiratory membrane that make alveolar gas exchange so efficient are

Correct AnswerverifiedShow Answer

Mucin _______ the viscosity of mucus,facilitating the ______ of dust and dirt particles.

Correct AnswerverifiedShow Answer

You may have noticed that after a large meal you have had some difficulty breathing.Which explanation is most accurate with regard to this situation

Correct AnswerverifiedShow Answer

In addition to oxygen,hemoglobin also transports

Correct AnswerverifiedShow Answer

The terms "upper respiratory system" and "lower respiratory system" are ___________ categorizations of the respiratory system.

Correct AnswerverifiedShow Answer

-In this close-up image of a lung,what structure does number 1 indicate

Correct AnswerverifiedShow Answer

Two individuals of the same size (same dead space) have a pulmonary ventilation rate of 6 L/min,but one is breathing 10 breaths/min and the other is breathing 15 breaths/min.How do their alveolar ventilation rates compare

Correct AnswerverifiedShow Answer

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Mucin _ the viscosity of mucus,facilitating the of dust and dirt particles.

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