Question 1

At the arterial end of the tissue capillaries,

Accepted Answer

A)  O2 diffuses from tissue cells into the blood, while CO2 diffuses from the blood into tissue cells. 
B)  O2 diffuses from the blood into tissue cells, while CO2 diffuses from tissue cells into the blood. 
C)  both O2 and CO2 diffuse from the blood into tissue cells. 
D)  both O2 and CO2 diffuse from tissue cells into the blood. 
E)  O2 diffuses from the blood into tissue cells, but there is no net movement of CO2. 
A)  O2 diffuses from tissue cells into the blood, while CO2 diffuses from the blood into tissue cells. 
B)  O2 diffuses from the blood into tissue cells, while CO2 diffuses from tissue cells into the blood. 
C)  both O2 and CO2 diffuse from the blood into tissue cells. 
D)  both O2 and CO2 diffuse from tissue cells into the blood. 
E)  O2 diffuses from the blood into tissue cells, but there is no net movement of CO2. B

Question 2

Arrange the following in order from highest to lowest PO2. (1) PO2 of pulmonary veins
(2) PO2 of pulmonary artery
(3) PO2 of alveolar air

Accepted Answer

A)  1, 2, 3 
B)  2, 1, 3 
C)  2, 3, 1 
D)  3, 1, 2 
E)  3, 2, 1 
A)  1, 2, 3 
B)  2, 1, 3 
C)  2, 3, 1 
D)  3, 1, 2 
E)  3, 2, 1 D

Question 3

Expiration during quiet breathing

Accepted Answer

A)  is an active process. 
B)  requires more muscle contractions than inspiration. 
C)  is due to contraction of the diaphragm and elevation of the ribs. 
D)  occurs when the diaphragm and external intercostal muscles relax. 
E)  is not affected by the elastic properties of the lungs. 
A)  is an active process. 
B)  requires more muscle contractions than inspiration. 
C)  is due to contraction of the diaphragm and elevation of the ribs. 
D)  occurs when the diaphragm and external intercostal muscles relax. 
E)  is not affected by the elastic properties of the lungs. D

Question 4

Arrange the following structures in the order air passes through them during inhalation: (1) alveolar ducts
(2) alveolus
(3) respiratory bronchiole
(4) terminal bronchiole

Accepted Answer

A)  1, 2, 3, 4 
B)  2, 1, 3, 4 
C)  4, 3, 1, 2 
D)  3, 2, 1, 4 
E)  4, 3, 2, 1 
A)  1, 2, 3, 4 
B)  2, 1, 3, 4 
C)  4, 3, 1, 2 
D)  3, 2, 1, 4 
E)  4, 3, 2, 1

Question 5

Rhythmicity of breathing involves

Accepted Answer

A)  conscious effort and control. 
B)  stimulation of inspiration. Expiration is automatic. 
C)  pontine respiratory group as a necessary part. 
D)  a set pattern of inspiration - expiration that is always the same. 
E)  the pre-Bötzinger complex of the ventral respiratory group. 
A)  conscious effort and control. 
B)  stimulation of inspiration. Expiration is automatic. 
C)  pontine respiratory group as a necessary part. 
D)  a set pattern of inspiration - expiration that is always the same. 
E)  the pre-Bötzinger complex of the ventral respiratory group.

Question 6

At the arterial end of the pulmonary capillaries,

Accepted Answer

A)  O2 diffuses from the alveoli into the blood, while CO2 diffuses from the blood into the alveoli. 
B)  O2 diffuses from the blood into the alveoli, while CO2 diffuses from the alveoli into the blood. 
C)  both O2 and CO2 diffuse from the blood into the alveoli. 
D)  both O2 and CO2 diffuse from the alveoli into the blood. 
E)  O2 diffuses from the alveoli into the blood, but there is no net movement of CO2. 
A)  O2 diffuses from the alveoli into the blood, while CO2 diffuses from the blood into the alveoli. 
B)  O2 diffuses from the blood into the alveoli, while CO2 diffuses from the alveoli into the blood. 
C)  both O2 and CO2 diffuse from the blood into the alveoli. 
D)  both O2 and CO2 diffuse from the alveoli into the blood. 
E)  O2 diffuses from the alveoli into the blood, but there is no net movement of CO2.

Question 7

The ranking from highest to lowest Po2 in the area of the arterial ends of the tissue capillaries is...

Accepted Answer

A)  capillaries, tissue fluid, cells. 
B)  cells, tissue fluid, capillaries. 
C)  cells, capillaries, tissue fluid. 
D)  tissue fluid, capillaries, cells. 
E)  all three are equal. 
A)  capillaries, tissue fluid, cells. 
B)  cells, tissue fluid, capillaries. 
C)  cells, capillaries, tissue fluid. 
D)  tissue fluid, capillaries, cells. 
E)  all three are equal.

Question 8

The direction of gas movement is determined by

Accepted Answer

A)  temperature. 
B)  size of the gas molecule. 
C)  solubility of the gas in blood. 
D)  partial pressure differences. 
E)  pH. 
A)  temperature. 
B)  size of the gas molecule. 
C)  solubility of the gas in blood. 
D)  partial pressure differences. 
E)  pH.

Question 9

Gas exchange between the air in the lungs and the blood takes place in the

Accepted Answer

A)  alveoli. 
B)  primary bronchi. 
C)  terminal bronchioles. 
D)  trachea. 
E)  respiratory bronchi. 
A)  alveoli. 
B)  primary bronchi. 
C)  terminal bronchioles. 
D)  trachea. 
E)  respiratory bronchi.

Question 10

Oxygen-rich blood is carried through pulmonary arteries from the lungs to the heart.

Accepted Answer

A) True 
 B)False

Question 11

The alveoli never attain equal pressure with the ambient (outside) air.

Accepted Answer

A) True 
 B)False

Question 12

Gasses diffuse because of differences in partial pressures from areas of higher pressure to areas of lower pressure.

Accepted Answer

A) True 
 B)False

Question 13

At the arterial ends of the pulmonary capillaries...

Accepted Answer

A)  the Po2 is higher in the capillaries than in the alveoli. 
B)  the Po2 is lower in the capillaries than in the alveoli. 
C)  the Po2 is equal in the capillaries and in the alveoli. 
D)  the Po2 is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries. 
E)  the Po2 is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries. 
A)  the Po2 is higher in the capillaries than in the alveoli. 
B)  the Po2 is lower in the capillaries than in the alveoli. 
C)  the Po2 is equal in the capillaries and in the alveoli. 
D)  the Po2 is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries. 
E)  the Po2 is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries.

Question 14

During expiration

Accepted Answer

A)  increased alveolar volume causes increased alveolar pressure. 
B)  increased alveolar volume causes decreased alveolar pressure. 
C)  decreased alveolar volume causes increased alveolar pressure. 
D)  decreased alveolar volume causes decreased alveolar pressure. 
E)  decreased alveolar pressure caused increased alveolar volume. 
A)  increased alveolar volume causes increased alveolar pressure. 
B)  increased alveolar volume causes decreased alveolar pressure. 
C)  decreased alveolar volume causes increased alveolar pressure. 
D)  decreased alveolar volume causes decreased alveolar pressure. 
E)  decreased alveolar pressure caused increased alveolar volume.

Question 15

What type of alveolar cells produce surfactant?

Accepted Answer

A)  ciliated simple cuboidal epithelial cells 
B)  Type I pneumocytes 
C)  surfactant secreting cells 
D)  macrophages 
A)  ciliated simple cuboidal epithelial cells 
B)  Type I pneumocytes 
C)  surfactant secreting cells 
D)  macrophages

Question 16

A(n) ________ in blood CO2 levels causes a(n) _________ in blood pH, resulting in a(n) __________ in breathing rate.

Accepted Answer

A)  decrease, decrease, increase 
B)  increase, decrease, increase 
C)  decrease, increase, decrease 
D)  increase, increase, decrease 
A)  decrease, decrease, increase 
B)  increase, decrease, increase 
C)  decrease, increase, decrease 
D)  increase, increase, decrease

Question 17

As the volume in the alveoli increases, the pressure decreases.

Accepted Answer

A) True 
 B)False

Question 18

Indicate whether each statement is true or false regarding the structure of the lungs.
1. The left lung has two lobes and right lung has three.
2. The cardiac notch is located on the hilum.
3. Each lobe is subdivided into bronchopulmonary segments.
4. The bronchopulmonary partitions in each lung are separated by connective tissue.
5. Bronchopulmonary segments are subdivided into lobes.

Accepted Answer

A) True 
 B)False

Question 19

When partial pressures for a given gas are equal between the capillaries and the tissue fluids, no net movement of that gas occurs.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A)  olfaction 
B)  taste 
C)  production of chemical mediators 
D)  voice production 
E)  regulation of blood pH 
A)  olfaction 
B)  taste 
C)  production of chemical mediators 
D)  voice production 
E)  regulation of blood pH

At the arterial end of the tissue capillaries,

Arrange the following in order from highest to lowest PO₂. (1) PO₂ of pulmonary veins (2) PO₂ of pulmonary artery (3) PO₂ of alveolar air

Expiration during quiet breathing

Arrange the following structures in the order air passes through them during inhalation: (1) alveolar ducts (2) alveolus (3) respiratory bronchiole (4) terminal bronchiole

Rhythmicity of breathing involves

At the arterial end of the pulmonary capillaries,

The ranking from highest to lowest Po2 in the area of the arterial ends of the tissue capillaries is...

The direction of gas movement is determined by

Gas exchange between the air in the lungs and the blood takes place in the

Oxygen-rich blood is carried through pulmonary arteries from the lungs to the heart.

The alveoli never attain equal pressure with the ambient (outside) air.

Gasses diffuse because of differences in partial pressures from areas of higher pressure to areas of lower pressure.

At the arterial ends of the pulmonary capillaries...

During expiration

What type of alveolar cells produce surfactant?

A(n) ____ in blood CO₂ levels causes a(n) _ in blood pH, resulting in a(n) ______ in breathing rate.

As the volume in the alveoli increases, the pressure decreases.

When partial pressures for a given gas are equal between the capillaries and the tissue fluids, no net movement of that gas occurs.

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

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

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Exam 15: Respiratory System

At the arterial end of the tissue capillaries,

Arrange the following in order from highest to lowest PO2. (1) PO2 of pulmonary veins (2) PO2 of pulmonary artery (3) PO2 of alveolar air

Expiration during quiet breathing

Arrange the following structures in the order air passes through them during inhalation: (1) alveolar ducts (2) alveolus (3) respiratory bronchiole (4) terminal bronchiole

Rhythmicity of breathing involves

At the arterial end of the pulmonary capillaries,

The ranking from highest to lowest Po2 in the area of the arterial ends of the tissue capillaries is...

The direction of gas movement is determined by

Gas exchange between the air in the lungs and the blood takes place in the

Oxygen-rich blood is carried through pulmonary arteries from the lungs to the heart.

The alveoli never attain equal pressure with the ambient (outside) air.

Gasses diffuse because of differences in partial pressures from areas of higher pressure to areas of lower pressure.

At the arterial ends of the pulmonary capillaries...

During expiration

What type of alveolar cells produce surfactant?

A(n) ________ in blood CO2 levels causes a(n) _________ in blood pH, resulting in a(n) __________ in breathing rate.

As the volume in the alveoli increases, the pressure decreases.

When partial pressures for a given gas are equal between the capillaries and the tissue fluids, no net movement of that gas occurs.

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

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

Arrange the following in order from highest to lowest PO₂. (1) PO₂ of pulmonary veins (2) PO₂ of pulmonary artery (3) PO₂ of alveolar air

A(n) ____ in blood CO₂ levels causes a(n) _ in blood pH, resulting in a(n) ______ in breathing rate.