Question 1

The partial pressure gradient for oxygen in the body is much steeper than that for carbon dioxide.Explain how equal amounts of these two gases can be exchanged (in a given time interval)in the lungs and at the tissues.What law describes this phenomenon?

Accepted Answer

Equal amounts of oxygen and carbon dioxi...

Question 2

What type of alveolar cell produces surfactant?

Accepted Answer

A)  type I alveolar cells
B)  type II alveolar cells
C)  alveolar macrophages
D)  dust cells

Question 3

Why is the inspiratory reserve volume (IRV)greater than the expiratory reserve volume (ERV)?

Accepted Answer

The IRV is larger than the ERV by about ...

Question 4

What does Boyle's law state about pressure and volume at a constant temperature and a constant pressure?

Accepted Answer

A)  Pressure and volume will both increase as temperature and pressure increase.
B)  Pressure and volume will both decrease as temperature and pressure decrease.
C)  Pressure and volume will both increase together or both decrease together.
D)  Pressure increases when volume decreases.

Question 5

Mr.Schmitzer has pulmonary fibrosis in which the elastic tissue of his lungs is replaced with dense irregular collagenous connective tissue.His condition primarily affects:

Accepted Answer

A)  surfactant production.
B)  alveolar surface tension.
C)  pulmonary compliance.
D)  airway resistance.

Question 6

Considering the role of the chemoreceptor in the regulation of the respiration rate,the most important stimulus that induces changes in ventilation is:

Accepted Answer

A)  partial pressure of oxygen (PO2) in venous blood.
B)  partial pressure of carbon dioxide (PCO2) in arterial blood.
C)  partial pressure of oxygen (PO2) in pulmonary capillaries.
D)  partial pressure of oxygen (PO2) in systemic capillaries.

Question 7

What is the function of the goblet cells?

Accepted Answer

A)  detect odors
B)  secrete mucus
C)  produce speech
D)  maintain acid-base balance

Question 8

What sweeps foreign debris from the lower respiratory passages?

Accepted Answer

A)  microvilli
B)  gap junctions
C)  flagella
D)  cilia

Question 9

The larynx lining transitions at the vocal cords from stratified squamous nonkeratinized epithelium to:

Accepted Answer

A)  simple columnar epithelium.
B)  pseudostratified ciliated columnar epithelium.
C)  simple squamous epithelium.
D)  transitional epithelium.

Question 10

If the ventral respiratory group (VRG) of neurons was destroyed:

Accepted Answer

A)  breathing would stop.
B)  pulmonary ventilation would increase rapidly.
C)  alveolar ventilation would increase.
D)  tidal volumes would increase.

Question 11

Predict what happens to air movement when atmospheric pressure is 760 mm Hg,intrapulmonary pressure is 758 mm Hg,and intrapleural pressure is 754 mm Hg.

Accepted Answer

A)  no air movement
B)  exhalation
C)  atelectasis
D)  inhalation

Question 12

The amount of air that can be forcibly expired after a normal tidal expiration is known as the:

Accepted Answer

A)  tidal volume.
B)  vital capacity.
C)  inspiratory reserve volume.
D)  expiratory reserve volume.

Question 13

The coupling of blood flow with the amount of air reaching the alveoli is known as:

Accepted Answer

A)  ventilation-perfusion matching.
B)  Henry's law.
C)  partial pressure.
D)  Boyle's law.

Question 14

Which process of respiration relies on partial pressure gradients to move air in and out of the lungs?

Accepted Answer

A)  both pulmonary gas exchange and tissue gas exchange
B)  both gas transport and pulmonary ventilation
C)  gas transport
D)  pulmonary ventilation

Question 15

Which of the following is NOT part of the upper respiratory tract?

Accepted Answer

A)  larynx
B)  trachea
C)  pharynx
D)  nose

Question 16

Which of the following counteracts the movement of bicarbonate ions from the RBCs?

Accepted Answer

A)  Dalton's law
B)  the Bohr effect
C)  the chloride shift
D)  ventilation-perfusion matching

Question 17

What increases air turbulence to extract dust and other debris from air traveling through the nasal cavity?

Accepted Answer

A)  septal cartilage
B)  nasal conchae and meatuses
C)  vestibule
D)  posterior nares

Question 18

Air inspired through the nasal cavity will travel through the nasopharynx,oropharynx,and then the laryngopharynx before entering the larynx.

Accepted Answer

A) True 
 B)False

Question 19

Which bone lacks a paranasal sinus?

Accepted Answer

A)  maxillary
B)  frontal
C)  zygomatic
D)  ethmoid

Question 20

What would increase the amount of oxygen unloaded by hemoglobin into peripheral tissues?

Accepted Answer

A)  decreased temperature
B)  decreased levels of BPG (2,3-bisphosphoglycerate) 
C)  decreased levels of PCO2
D)  decreased pH

Exam 21: The Respiratory System

If the ventral respiratory group (VRG) of neurons was destroyed:

Correct AnswerverifiedShow Answer

The partial pressure gradient for oxygen in the body is much steeper than that for carbon dioxide.Explain how equal amounts of these two gases can be exchanged (in a given time interval)in the lungs and at the tissues.What law describes this phenomenon?

Correct AnswerverifiedEqual amounts of oxygen and carbon dioxi...View AnswerShow Answer

The amount of air that can be forcibly expired after a normal tidal expiration is known as the:

Correct AnswerverifiedShow Answer

Predict what happens to air movement when atmospheric pressure is 760 mm Hg,intrapulmonary pressure is 758 mm Hg,and intrapleural pressure is 754 mm Hg.

Correct AnswerverifiedShow Answer

Which process of respiration relies on partial pressure gradients to move air in and out of the lungs?

Correct AnswerverifiedShow Answer

The coupling of blood flow with the amount of air reaching the alveoli is known as:

Correct AnswerverifiedShow Answer

Which bone lacks a paranasal sinus?

Correct AnswerverifiedShow Answer

What sweeps foreign debris from the lower respiratory passages?

Correct AnswerverifiedShow Answer

Considering the role of the chemoreceptor in the regulation of the respiration rate,the most important stimulus that induces changes in ventilation is:

Correct AnswerverifiedShow Answer

The larynx lining transitions at the vocal cords from stratified squamous nonkeratinized epithelium to:

Correct AnswerverifiedShow Answer

Air inspired through the nasal cavity will travel through the nasopharynx,oropharynx,and then the laryngopharynx before entering the larynx.

Correct AnswerverifiedShow Answer

What type of alveolar cell produces surfactant?

Correct AnswerverifiedShow Answer

What would increase the amount of oxygen unloaded by hemoglobin into peripheral tissues?

Correct AnswerverifiedShow Answer

Which of the following is NOT part of the upper respiratory tract?

Correct AnswerverifiedShow Answer

What does Boyle's law state about pressure and volume at a constant temperature and a constant pressure?

Correct AnswerverifiedShow Answer

Mr.Schmitzer has pulmonary fibrosis in which the elastic tissue of his lungs is replaced with dense irregular collagenous connective tissue.His condition primarily affects:

Correct AnswerverifiedShow Answer

What is the function of the goblet cells?

Correct AnswerverifiedShow Answer

Which of the following counteracts the movement of bicarbonate ions from the RBCs?

Correct AnswerverifiedShow Answer

Why is the inspiratory reserve volume (IRV)greater than the expiratory reserve volume (ERV)?

Correct AnswerverifiedThe IRV is larger than the ERV by about ...View AnswerShow Answer

What increases air turbulence to extract dust and other debris from air traveling through the nasal cavity?

Correct AnswerverifiedShow Answer

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Equal amounts of oxygen and carbon dioxi...
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The IRV is larger than the ERV by about ...
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