Question 1

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

Question 2

Complete each of the following statments.
The primary factor that determines the percent Hb saturation is the ____________________.

Accepted Answer

The primary factor that determ

Question 3

The apneustic center

Accepted Answer

A)  is located in the medulla 
B)  stimulates the inspiratory neurons 
C)  inhibits inspiratory activity 
D)  stimulates the inspiratory neurons and inhibits inspiratory activity 
E)  none of these 
A)  is located in the medulla 
B)  stimulates the inspiratory neurons 
C)  inhibits inspiratory activity 
D)  stimulates the inspiratory neurons and inhibits inspiratory activity 
E)  none of these

Question 4

The most important factor that determines the extent to which hemoglobin is saturated with oxygen is the blood $\mathrm { P } _ { 0 _ { 2 } }$ .

Accepted Answer

A) True 
 B)False

Question 5

The respiratory quotient is

Accepted Answer

A)  the rate at which gases diffuse across the alveolar capillary membrane 
B)  respiratory rate times tidal volume 
C)  the ratio of O2 consumed to CO2 produced 
D)  the ratio of CO2 produced to O2 consumed 
E)  equal to 1.0 on a typical American diet 
A)  the rate at which gases diffuse across the alveolar capillary membrane 
B)  respiratory rate times tidal volume 
C)  the ratio of O2 consumed to CO2 produced 
D)  the ratio of CO2 produced to O2 consumed 
E)  equal to 1.0 on a typical American diet

Question 6

Complete each of the following statments.
____________________ refers to air flow between adjacent alveoli through the pores of Kohn.

Accepted Answer

Collateral

Question 7

The inspiratory and expiratory neurons both display pacemaker activity.

Accepted Answer

A) True 
 B)False

Question 8

A person who has a tidal volume of 400 ml, a respiratory rate of 14, and an anatomic dead space volume of 150 ml will have an alveolar ventilation rate of

Accepted Answer

A)  3,500 ml/minute 
B)  3,920 ml/minute 
C)  4,260 ml/minute 
D)  5,600 ml/minute 
E)  6,240 ml/minute 
A)  3,500 ml/minute 
B)  3,920 ml/minute 
C)  4,260 ml/minute 
D)  5,600 ml/minute 
E)  6,240 ml/minute

Question 9

The work of breathing normally requires about 3% of total energy expenditure; this increases under all of the following situations except when:

Accepted Answer

A)  Elastic recoil is decreased. 
B)  Resistance goes up. 
C)  The partial pressure of oxygen increases in the air. 
D)  Ventilation must be increased. 
E)  Compliance is decreased. 
A)  Elastic recoil is decreased. 
B)  Resistance goes up. 
C)  The partial pressure of oxygen increases in the air. 
D)  Ventilation must be increased. 
E)  Compliance is decreased.

Question 10

The vital capacity

Accepted Answer

A)  is the volume normally entering or leaving the lungs during a single breath 
B)  is the maximum volume that can be moved in or out during a single breath 
C)  is the maximum volume the lungs can hold 
D)  is the minimum volume the lungs can hold 
E)  none of these 
A)  is the volume normally entering or leaving the lungs during a single breath 
B)  is the maximum volume that can be moved in or out during a single breath 
C)  is the maximum volume the lungs can hold 
D)  is the minimum volume the lungs can hold 
E)  none of these

Question 11

Complete each of the following statments.
As the resistance of the air passages increases, the airflow through them ____________________ if the pressure gradient remains constant.

Accepted Answer

The answer of Complete each of the following statments.
As the...

Question 12

Which of the following does not occur during expiration when a person is breathing quietly?

Accepted Answer

A)  The size of the thoracic cavity is reduced. 
B)  The intra-alveolar pressure becomes greater than atmospheric pressure. 
C)  Air flows out of the lungs. 
D)  The expiratory muscles contract. 
E)  Intrapleural pressure is less than intra-alveolar pressure. 
A)  The size of the thoracic cavity is reduced. 
B)  The intra-alveolar pressure becomes greater than atmospheric pressure. 
C)  Air flows out of the lungs. 
D)  The expiratory muscles contract. 
E)  Intrapleural pressure is less than intra-alveolar pressure.

Question 13

Complete each of the following statments.
If the concentration of carbon dioxide at sea level (760 mm Hg) is 0.04 of 1.0%, the partial pressure of this gas is ____________________ mm of Hg.

Accepted Answer

The answer of Complete each of the following statments.
If the...

Question 14

When inspiratory neurons stop firing, the expiratory muscles will contract.

Accepted Answer

A) True 
 B)False

Question 15

Type I alveolar cells

Accepted Answer

A)  form the wall of the alveoli 
B)  secrete pulmonary surfactant 
C)  contract during expiration to force air out of the alveoli 
D)  form the wall of the alveoli and secrete pulmonary surfactant 
E)  all of these 
A)  form the wall of the alveoli 
B)  secrete pulmonary surfactant 
C)  contract during expiration to force air out of the alveoli 
D)  form the wall of the alveoli and secrete pulmonary surfactant 
E)  all of these

Question 16

The chloride shift in red blood cells

Accepted Answer

A)  prevents electrical gradient development 
B)  occurs in response to bicarbonate movement into the plasma 
C)  prevents an increase in blood pH 
D)  prevents electrical gradient development and occurs in response to bicarbonate movement into the plasma 
E)  all of these 
A)  prevents electrical gradient development 
B)  occurs in response to bicarbonate movement into the plasma 
C)  prevents an increase in blood pH 
D)  prevents electrical gradient development and occurs in response to bicarbonate movement into the plasma 
E)  all of these

Question 17

Complete each of the following statments.
Pulmonary ventilation is another name for the mechanical act of ____________________.

Accepted Answer

The answer of Complete each of the following statments.
Pulmonary ventilation...

Question 18

Complete each of the following statments.
The ____________________ pressure is the pressure exerted by the weight of the air in the atmosphere.

Accepted Answer

The answer of Complete each of the following statments.
The ____________________...

Exam 13: A--The Respiratory System

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

Complete each of the following statments. The primary factor that determines the percent Hb saturation is the ____________________.

The apneustic center

The most important factor that determines the extent to which hemoglobin is saturated with oxygen is the blood P02\mathrm { P } _ { 0 _ { 2 } }P02​​ .

The respiratory quotient is

Complete each of the following statments. ____________________ refers to air flow between adjacent alveoli through the pores of Kohn.

The inspiratory and expiratory neurons both display pacemaker activity.

A person who has a tidal volume of 400 ml, a respiratory rate of 14, and an anatomic dead space volume of 150 ml will have an alveolar ventilation rate of

The work of breathing normally requires about 3% of total energy expenditure; this increases under all of the following situations except when:

The vital capacity

Complete each of the following statments. As the resistance of the air passages increases, the airflow through them ____________________ if the pressure gradient remains constant.

Which of the following does not occur during expiration when a person is breathing quietly?

Complete each of the following statments. If the concentration of carbon dioxide at sea level (760 mm Hg) is 0.04 of 1.0%, the partial pressure of this gas is ____________________ mm of Hg.

When inspiratory neurons stop firing, the expiratory muscles will contract.

Type I alveolar cells

The chloride shift in red blood cells

Complete each of the following statments. Pulmonary ventilation is another name for the mechanical act of ____________________.

Complete each of the following statments. The ____________________ pressure is the pressure exerted by the weight of the air in the atmosphere.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

A--The Central Nervous System

B--The Central Nervous System

A--The Peripheral Nervous System: Afferent Division; Special Senses

B--The Peripheral Nervous System: Afferent Division; Special Senses

The Peripheral Nervous System: Efferent Division

A--Muscle Physiology

B--Muscle Physiology

A--Cardiac Physiology

B--Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

B--The Respiratory System

A--The Urinary System

B--The Urinary System

A--Fluid and Acid-Base Balance

B--Fluid and Acid-Base Balance

A--The Digestive System

B--The Digestive System

Energy Balance and Temperature Regulation

A--Principles of Endocrinology: the Central Endocrine Glands

B--Principles of Endocrinology: the Central Endocrine Glands

A--The Peripheral Endocrine Glands

B--The Peripheral Endocrine Glands

A--The Reproductive System

B--The Reproductive System

Filters

The most important factor that determines the extent to which hemoglobin is saturated with oxygen is the blood $\mathrm { P } _ { 0 _ { 2 } }$ .