Question 1

Receptors in the CNS that detect changes in arterial PCO2 are actually sensitive to the H+ concentration of the brain extracellular fluid.

Accepted Answer

A) True 
 B)False

Question 2

Which of these conditions would result in the lowest alveolar ventilation rate?

Accepted Answer

A) quiet breathing 
B) a normal respiratory rate and normal tidal volume 
C)  a low respiratory rate and high tidal volume 
D)  a low respiratory rate and very low tidal volume 
A) quiet breathing 
B) a normal respiratory rate and normal tidal volume 
C)  a low respiratory rate and high tidal volume 
D)  a low respiratory rate and very low tidal volume

Question 3

Match the effects on the rate of gas transfer, labelled a. through c., with the changes listed. (Options may be used more than once or not at all.)
a.This change would increase the rate of gas transfer.
b.This change would decrease the rate of gas transfer.
c.This change would have no effect on the rate of gas transfer.
-the effect of a fall in atmospheric PO2 on O2 exchange within the lungs

Accepted Answer

Question 4

Which one of these factors would reduce the alveolar ventilation rate the most?

Accepted Answer

A) increased alveolar dead space 
B) decreased alveolar dead space 
C)  increased tidal volume 
D)  increased vital capacity 
A) increased alveolar dead space 
B) decreased alveolar dead space 
C)  increased tidal volume 
D)  increased vital capacity

Question 5

A slight decrease in arterial PO2 below normal is a more potent stimulus toward increasing respiration than is a slight increase in PCO2 above normal.

Accepted Answer

A) True 
 B)False

Question 6

Patients suffering from chronic obstructive pulmonary disease generally have more trouble exhaling than inhaling.

Accepted Answer

A) True 
 B)False

Question 7

Which one of these conditions exists at high altitudes?

Accepted Answer

A) histotoxic hypoxia 
B) hypocapnia 
C)  anaemic hypoxia 
D)  hypoxic hypoxia 
A) histotoxic hypoxia 
B) hypocapnia 
C)  anaemic hypoxia 
D)  hypoxic hypoxia

Question 8

During external respiration, the PO2 is greater in the alveoli than in the blood of the pulmonary capillaries.

Accepted Answer

A) True 
 B)False

Question 9

If the tidal volume is 500 mL and the anatomic dead space volume is 150 mL, only 350 mL of air enters the alveoli during inspiration.

Accepted Answer

A) True 
 B)False

Question 10

Which of these factors would result in bronchoconstriction?

Accepted Answer

A) sympathetic stimulation 
B) increased carbon dioxide concentration 
C)  epinephrine secretion 
D)  parasympathetic stimulation 
A) sympathetic stimulation 
B) increased carbon dioxide concentration 
C)  epinephrine secretion 
D)  parasympathetic stimulation

Question 11

____________________ is inflammation of the pleural sac.

Accepted Answer

The answer of ____________________ is inflammation of the pleural sac....

Question 12

Which type of chronic obstructive pulmonary disease is characterized by a breakdown of alveolar walls and collapse of the smaller airways?

Accepted Answer

A) asthma 
B) chronic bronchitis 
C)  emphysema 
D)  bronchiectasis 
A) asthma 
B) chronic bronchitis 
C)  emphysema 
D)  bronchiectasis

Question 13

Which of these statements does NOT correctly describe 2,3-bisphosphoglycerate?

Accepted Answer

A) It is produced within red blood cells. 
B) Its production is inhibited by HbO2. 
C)  Its concentration gradually decreases whenever Hb in the arterial blood is chronically undersaturated. 
D)  It affects the degree of binding of oxygen to haemoglobin. 
A) It is produced within red blood cells. 
B) Its production is inhibited by HbO2. 
C)  Its concentration gradually decreases whenever Hb in the arterial blood is chronically undersaturated. 
D)  It affects the degree of binding of oxygen to haemoglobin.

Question 14

The tidal volume is the sum of the vital capacity, expiratory reserve volume, and inspiratory reserve volume.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is NOT a function of the respiratory system?

Accepted Answer

A) to transport O2 to the tissues 
B) to contribute to maintenance of normal acid-base balance 
C)  to provide a route for heat and water elimination 
D)  to enable speech, singing, and other vocalization 
A) to transport O2 to the tissues 
B) to contribute to maintenance of normal acid-base balance 
C)  to provide a route for heat and water elimination 
D)  to enable speech, singing, and other vocalization

Question 16

Which of these values is the atmospheric PO2?

Accepted Answer

A) approximately 25 mmHg 
B) approximately 120 mmHg 
C)  approximately 160 mmHg 
D)  approximately 220 mmHg 
A) approximately 25 mmHg 
B) approximately 120 mmHg 
C)  approximately 160 mmHg 
D)  approximately 220 mmHg

Question 17

Which of these statements correctly describes residual volume?

Accepted Answer

A) It helps prevent lung collapse. 
B) It is the normal volume of air inhaled. 
C)  It is the normal volume of air exhaled. 
D)  It is the maximum volume of air that can be inspired. 
A) It helps prevent lung collapse. 
B) It is the normal volume of air inhaled. 
C)  It is the normal volume of air exhaled. 
D)  It is the maximum volume of air that can be inspired.

Question 18

Pulmonary surfactant increases alveolar surface tension and does not affect lung expansion.

Accepted Answer

A) True 
 B)False

Question 19

If the alveolar PO2 is 100 mmHg, what will be the PO2 of the blood leaving the pulmonary capillaries in a normal person?

Accepted Answer

A) 20 mmHg 
B) 46 mmHg 
C)  100 mmHg 
D)  760 mmHg 
A) 20 mmHg 
B) 46 mmHg 
C)  100 mmHg 
D)  760 mmHg

Question 20

The internal intercostal muscles are inspiratory muscles because they lift the ribs upward and outward to enlarge the thoracic cavity.

Accepted Answer

A) True 
 B)False

Receptors in the CNS that detect changes in arterial P_CO2 are actually sensitive to the H⁺ concentration of the brain extracellular fluid.

Which of these conditions would result in the lowest alveolar ventilation rate?

Which one of these factors would reduce the alveolar ventilation rate the most?

A slight decrease in arterial P_O2 below normal is a more potent stimulus toward increasing respiration than is a slight increase in P_CO2 above normal.

Patients suffering from chronic obstructive pulmonary disease generally have more trouble exhaling than inhaling.

Which one of these conditions exists at high altitudes?

During external respiration, the P_O2 is greater in the alveoli than in the blood of the pulmonary capillaries.

If the tidal volume is 500 mL and the anatomic dead space volume is 150 mL, only 350 mL of air enters the alveoli during inspiration.

Which of these factors would result in bronchoconstriction?

____________________ is inflammation of the pleural sac.

Which type of chronic obstructive pulmonary disease is characterized by a breakdown of alveolar walls and collapse of the smaller airways?

Which of these statements does NOT correctly describe 2,3-bisphosphoglycerate?

The tidal volume is the sum of the vital capacity, expiratory reserve volume, and inspiratory reserve volume.

Which of the following is NOT a function of the respiratory system?

Which of these values is the atmospheric P_O2?

Which of these statements correctly describes residual volume?

Pulmonary surfactant increases alveolar surface tension and does not affect lung expansion.

If the alveolar P_O2 is 100 mmHg, what will be the P_O2 of the blood leaving the pulmonary capillaries in a normal person?

The internal intercostal muscles are inspiratory muscles because they lift the ribs upward and outward to enlarge the thoracic cavity.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division; Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

Filters

Exam 11: The Blood

Receptors in the CNS that detect changes in arterial PCO2 are actually sensitive to the H+ concentration of the brain extracellular fluid.

Which of these conditions would result in the lowest alveolar ventilation rate?

Which one of these factors would reduce the alveolar ventilation rate the most?

A slight decrease in arterial PO2 below normal is a more potent stimulus toward increasing respiration than is a slight increase in PCO2 above normal.

Patients suffering from chronic obstructive pulmonary disease generally have more trouble exhaling than inhaling.

Which one of these conditions exists at high altitudes?

During external respiration, the PO2 is greater in the alveoli than in the blood of the pulmonary capillaries.

If the tidal volume is 500 mL and the anatomic dead space volume is 150 mL, only 350 mL of air enters the alveoli during inspiration.

Which of these factors would result in bronchoconstriction?

____________________ is inflammation of the pleural sac.

Which type of chronic obstructive pulmonary disease is characterized by a breakdown of alveolar walls and collapse of the smaller airways?

Which of these statements does NOT correctly describe 2,3-bisphosphoglycerate?

The tidal volume is the sum of the vital capacity, expiratory reserve volume, and inspiratory reserve volume.

Which of the following is NOT a function of the respiratory system?

Which of these values is the atmospheric PO2?

Which of these statements correctly describes residual volume?

Pulmonary surfactant increases alveolar surface tension and does not affect lung expansion.

If the alveolar PO2 is 100 mmHg, what will be the PO2 of the blood leaving the pulmonary capillaries in a normal person?

The internal intercostal muscles are inspiratory muscles because they lift the ribs upward and outward to enlarge the thoracic cavity.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division; Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

Filters

Receptors in the CNS that detect changes in arterial P_CO2 are actually sensitive to the H⁺ concentration of the brain extracellular fluid.

A slight decrease in arterial P_O2 below normal is a more potent stimulus toward increasing respiration than is a slight increase in P_CO2 above normal.

During external respiration, the P_O2 is greater in the alveoli than in the blood of the pulmonary capillaries.

Which of these values is the atmospheric P_O2?

If the alveolar P_O2 is 100 mmHg, what will be the P_O2 of the blood leaving the pulmonary capillaries in a normal person?