Question 1

Apnea is the slowing of respiration as occurs during sleep.

Accepted Answer

A) True 
 B)False

Question 2

A baby holding its breath will

Accepted Answer

A)  be termed a "blue baby". 
B)  have brain cells damaged because of low blood oxygen levels. 
C)  suffer heart damage because of increased pressure in the aorta. 
D)  automatically start to breathe when the CO2 levels in the blood reach a high enough value. 
E)  automatically start to breathe when oxygen levels decrease slightly. 
A)  be termed a "blue baby". 
B)  have brain cells damaged because of low blood oxygen levels. 
C)  suffer heart damage because of increased pressure in the aorta. 
D)  automatically start to breathe when the CO2 levels in the blood reach a high enough value. 
E)  automatically start to breathe when oxygen levels decrease slightly.

Question 3

During exercise, the oxygen-hemoglobin dissociation curve

Accepted Answer

A)  shifts to the right. 
B)  shifts to the left. 
C)  doesn't shift. 
A)  shifts to the right. 
B)  shifts to the left. 
C)  doesn't shift.

Question 4

Normally, the partial pressure of oxygen gas is higher in the ________.

Accepted Answer

A)  blood of the pulmonary capillaries 
B)  bronchioles 
C)  alveoli 
D)  venous blood 
A)  blood of the pulmonary capillaries 
B)  bronchioles 
C)  alveoli 
D)  venous blood

Question 5

Contraction of respiratory muscles are responsible for the movement of air out of the lungs in quiet expiration.

Accepted Answer

A) True 
 B)False

Question 6

The highest level of exercise that can be performed without causing a significant change in blood pH is called the ________.

Accepted Answer

A)  Hering-Breuer reflex 
B)  aerobic threshold 
C)  anaerobic threshold 
D)  lactate tolerance level 
A)  Hering-Breuer reflex 
B)  aerobic threshold 
C)  anaerobic threshold 
D)  lactate tolerance level

Question 7

Muscles of the thoracic wall are important for changing thoracic volume during expiration only.

Accepted Answer

A) True 
 B)False

Question 8

Mr. Smith hypoventilates and retains too much CO2. Which of the following receptors is stimulated by an increase in CO2?

Accepted Answer

A)  Irritant receptors 
B)  Pressure receptors 
C)  Osmoreceptors 
D)  Peripheral chemoreceptors 
E)  Baroreceptors 
A)  Irritant receptors 
B)  Pressure receptors 
C)  Osmoreceptors 
D)  Peripheral chemoreceptors 
E)  Baroreceptors

Question 9

Physiological dead air space is anatomic dead space plus

Accepted Answer

A)  the residual volume. 
B)  the volume of any alveoli where gas exchange is diminished. 
C)  the volume of blood flowing to the lungs. 
D)  the respiration rate. 
E)  tidal volume. 
A)  the residual volume. 
B)  the volume of any alveoli where gas exchange is diminished. 
C)  the volume of blood flowing to the lungs. 
D)  the respiration rate. 
E)  tidal volume.

Question 10

Match the disorder of the respiratory system with the best description.
-Increase in pH

Accepted Answer

A) Destruction of the alveolar walls 
B) Inflammation of the bronchi 
C) Inherited disease that affects secretory cells lining the lungs 
D) Replacement of lung tissue with fibrous connective tissue 
E) Infant stops breathing during sleep 
A) Destruction of the alveolar walls 
B) Inflammation of the bronchi 
C) Inherited disease that affects secretory cells lining the lungs 
D) Replacement of lung tissue with fibrous connective tissue 
E) Infant stops breathing during sleep

Question 11

The largest division of each lung are ________, which are divided into ________.

Accepted Answer

A)  lobules; segments 
B)  segments; lobules 
C)  lobes; lobules 
D)  segments; lobes 
E)  lobes; segments 
A)  lobules; segments 
B)  segments; lobules 
C)  lobes; lobules 
D)  segments; lobes 
E)  lobes; segments

Question 12

Pulmonary edema will cause the rate of gas diffusion to ________.

Accepted Answer

A)  increase 
B)  decrease 
C)  remain the same 
A)  increase 
B)  decrease 
C)  remain the same

Question 13

Match the disorder of the respiratory system with the best description.
-Decrease in CO2

Accepted Answer

A) Destruction of the alveolar walls 
B) Inflammation of the bronchi 
C) Inherited disease that affects secretory cells lining the lungs 
D) Replacement of lung tissue with fibrous connective tissue 
E) Infant stops breathing during sleep 
A) Destruction of the alveolar walls 
B) Inflammation of the bronchi 
C) Inherited disease that affects secretory cells lining the lungs 
D) Replacement of lung tissue with fibrous connective tissue 
E) Infant stops breathing during sleep

Question 14

The composition of alveolar air differs from atmospheric air. Indicate all of the factors that account for this difference.

Accepted Answer

A)  Nitrogen does not enter alveoli 
B)  Difference in overall (total) pressure 
C)  Presence of water vapor 
D)  Gas exchange adds CO2 
E)  Gas exchange removes O2 
A)  Nitrogen does not enter alveoli 
B)  Difference in overall (total) pressure 
C)  Presence of water vapor 
D)  Gas exchange adds CO2 
E)  Gas exchange removes O2

Question 15

Why is the PO2 of the blood leaving pulmonary capillaries 104 mm Hg, but the blood leaving the lungs to enter the left atrium is 95 mm Hg?

Accepted Answer

A)  Some O2 diffuses out of the blood as it travels through the pulmonary veins. 
B)  Some O2 is incorporated into bicarbonate ion, removing it from solution and reducing PO2. 
C)  Some CO2 in the alveoli is mixed with oxygenated blood from alveolar circulation. 
D)  Deoxygenated blood from bronchial circulation is mixed with blood from oxygenated alveolar circulation. 
A)  Some O2 diffuses out of the blood as it travels through the pulmonary veins. 
B)  Some O2 is incorporated into bicarbonate ion, removing it from solution and reducing PO2. 
C)  Some CO2 in the alveoli is mixed with oxygenated blood from alveolar circulation. 
D)  Deoxygenated blood from bronchial circulation is mixed with blood from oxygenated alveolar circulation.

Question 16

Hemoglobin that has released its O2

Accepted Answer

A)  loses its affinity for O2. 
B)  will dissolve in the plasma. 
C)  will bind more readily to CO2. 
D)  is broken down to heme and globin and excreted. 
E)  will bind more readily to O2. 
A)  loses its affinity for O2. 
B)  will dissolve in the plasma. 
C)  will bind more readily to CO2. 
D)  is broken down to heme and globin and excreted. 
E)  will bind more readily to O2.

Question 17

In which of the following situations is compliance greatest?

Accepted Answer

A)  Collapse of the alveoli 
B)  Airway obstruction 
C)  Emphysema 
D)  Pulmonary fibrosis 
E)  Pulmonary edema 
A)  Collapse of the alveoli 
B)  Airway obstruction 
C)  Emphysema 
D)  Pulmonary fibrosis 
E)  Pulmonary edema

Question 18

Air in the pleural cavity is called

Accepted Answer

A)  emphysema. 
B)  respiratory distress syndrome. 
C)  a pneumothorax. 
D)  pneumonia. 
E)  forced expiration. 
A)  emphysema. 
B)  respiratory distress syndrome. 
C)  a pneumothorax. 
D)  pneumonia. 
E)  forced expiration.

Question 19

The pontine respiratory neurons

Accepted Answer

A)  are located in the medulla oblongata in the brain. 
B)  are active only during inspiration. 
C)  are active only during expiration. 
D)  play a role in switching between inspiration and expiration. 
E)  is essential for respiratory rhythm. 
A)  are located in the medulla oblongata in the brain. 
B)  are active only during inspiration. 
C)  are active only during expiration. 
D)  play a role in switching between inspiration and expiration. 
E)  is essential for respiratory rhythm.

Question 20

As the result of an asthmatic attack,

Accepted Answer

A)  ventilation exceeds the ability of blood to pick up oxygen. 
B)  ventilation is inadequate to oxygenate blood. 
C)  pulmonary blood flow is reduced while ventilation remains normal. 
D)  the surface area available for gas exchange increases. 
E)  bronchioles dilate. 
A)  ventilation exceeds the ability of blood to pick up oxygen. 
B)  ventilation is inadequate to oxygenate blood. 
C)  pulmonary blood flow is reduced while ventilation remains normal. 
D)  the surface area available for gas exchange increases. 
E)  bronchioles dilate.

Exam 23: Respiratory System

Apnea is the slowing of respiration as occurs during sleep.

A baby holding its breath will

During exercise, the oxygen-hemoglobin dissociation curve

Normally, the partial pressure of oxygen gas is higher in the ________.

Contraction of respiratory muscles are responsible for the movement of air out of the lungs in quiet expiration.

The highest level of exercise that can be performed without causing a significant change in blood pH is called the ________.

Muscles of the thoracic wall are important for changing thoracic volume during expiration only.

Mr. Smith hypoventilates and retains too much CO2. Which of the following receptors is stimulated by an increase in CO2?

Physiological dead air space is anatomic dead space plus

Match the disorder of the respiratory system with the best description. -Increase in pH

The largest division of each lung are ________, which are divided into ________.

Pulmonary edema will cause the rate of gas diffusion to ________.

Match the disorder of the respiratory system with the best description. -Decrease in CO2

The composition of alveolar air differs from atmospheric air. Indicate all of the factors that account for this difference.

Why is the PO2 of the blood leaving pulmonary capillaries 104 mm Hg, but the blood leaving the lungs to enter the left atrium is 95 mm Hg?

Hemoglobin that has released its O2

In which of the following situations is compliance greatest?

Air in the pleural cavity is called

The pontine respiratory neurons

As the result of an asthmatic attack,

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joint and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

Mr. Smith hypoventilates and retains too much CO₂. Which of the following receptors is stimulated by an increase in CO₂?

The largest division of each lung are , which are divided into .

Match the disorder of the respiratory system with the best description. -Decrease in CO₂

Why is the P_O2 of the blood leaving pulmonary capillaries 104 mm Hg, but the blood leaving the lungs to enter the left atrium is 95 mm Hg?

Hemoglobin that has released its O₂