Question 1

Increased acidity at the tissue cells stimulates increased dissociation of oxyhaemoglobin.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following does NOT promote elastic recoil of the lungs?

Accepted Answer

A) elastic fibres in the lung 
B) surface tension of the fluid lining the alveoli 
C)  pulmonary surfactant 
D)  elastic fibres in the bronchiole 
A) elastic fibres in the lung 
B) surface tension of the fluid lining the alveoli 
C)  pulmonary surfactant 
D)  elastic fibres in the bronchiole

Question 3

The most important factor that determines the extent to which haemoglobin is saturated with oxygen is the blood PO2.

Accepted Answer

A) True 
 B)False

Question 4

Where are the stretch receptors for the Breuer-Hering reflex located?

Accepted Answer

A) midbrain 
B) elastic tissue of the lungs 
C)  medulla 
D)  smooth muscle layer of the airways 
A) midbrain 
B) elastic tissue of the lungs 
C)  medulla 
D)  smooth muscle layer of the airways

Question 5

The subjective sensation of not getting enough air is known as ____________________.

Accepted Answer

The answer of The subjective sensation of not getting enough...

Question 6

Both the respiratory system and the circulatory system are involved in the process of respiration.

Accepted Answer

A) True 
 B)False

Question 7

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 reduced systemic venous PO2 on O2 exchange within the lungs

Accepted Answer

Question 8

What does it mean to say that haemoglobin is fully saturated?

Accepted Answer

A) There is an oxygen molecule attached to each of the four heme groups. 
B) Oxygen is attached to both the heme and the globin portions of the molecule. 
C)  The red blood cells contain as many haemoglobin molecules as possible. 
D)  Haemoglobin is carrying both oxygen and carbon dioxide simultaneously. 
A) There is an oxygen molecule attached to each of the four heme groups. 
B) Oxygen is attached to both the heme and the globin portions of the molecule. 
C)  The red blood cells contain as many haemoglobin molecules as possible. 
D)  Haemoglobin is carrying both oxygen and carbon dioxide simultaneously.

Question 9

A drop in the oxygen levels in arterial blood ____________________ the central chemoreceptors.

Accepted Answer

The answer of A drop in the oxygen levels in...

Question 10

If 20 percent of the air is composed of O2, what is the partial pressure of oxygen at sea level where atmospheric pressure is 760 mmHg?

Accepted Answer

A) 20 mmHg 
B) 70 mmHg 
C)  152 mmHg 
D)  760 mmHg 
A) 20 mmHg 
B) 70 mmHg 
C)  152 mmHg 
D)  760 mmHg

Question 11

Without pulmonary surfactant, which one of these actions would happen?

Accepted Answer

A) Small alveoli would tend to collapse. 
B) Larger alveoli would tend to empty into smaller alveoli. 
C)  All alveoli would be easier to inflate. 
D)  The surface tension in the alveoli would be reduced. 
A) Small alveoli would tend to collapse. 
B) Larger alveoli would tend to empty into smaller alveoli. 
C)  All alveoli would be easier to inflate. 
D)  The surface tension in the alveoli would be reduced.

Question 12

Intrapleural pressure is usually less than atmospheric pressure.

Accepted Answer

A) True 
 B)False

Question 13

The ____________________ serves as a common passageway for both the respiratory and digestive systems.

Accepted Answer

The answer of The ____________________ serves as a common passageway...

Question 14

Which of these statements does NOT correctly describe the partial pressure of oxygen in the pulmonary veins?

Accepted Answer

A) It is about 100 mmHg. 
B) It is equivalent to alveolar partial pressure. 
C)  It is the same as pulmonary arteries' partial pressure. 
D)  It is highest in the pulmonary veins. 
A) It is about 100 mmHg. 
B) It is equivalent to alveolar partial pressure. 
C)  It is the same as pulmonary arteries' partial pressure. 
D)  It is highest in the pulmonary veins.

Question 15

___________________ is normally the most important input in regulating the magnitude of ventilation under resting conditions.

Accepted Answer

The answer of ___________________ is normally the most important input...

Question 16

Match the physiological factors, labelled a. through e., with the descriptions. (Options may be used more than once or not at all.)
a.arterial PS1U1B1O2S1U1B0 between 60 to 100 mmHg
b.arterial PS1U1B1O2S1U1B0 less than 60 mmHg
c.arterial PS1U1B1CO2S1U1B0 increased above normal
d.brain ECF HS1U1P1+S1S1P0 increased above normal
e.arterial HS1U1P1+S1S1P0 increased above normal
-stimulates the peripheral chemoreceptors

Accepted Answer

The answer of Match the physiological factors, labelled a. through...

Question 17

The VRG consists of ____________________ and ____________________ neurons.

Accepted Answer

inspirator

Question 18

____________________ refers to a collapsed lung.

Accepted Answer

The answer of ____________________ refers to a collapsed lung....

Question 19

Which structure serves as a common passageway for both the respiratory and the digestive systems?

Accepted Answer

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

Question 20

Stimulation of the sympathetic nervous system and release of epinephrine lead to an increase in airway resistance.

Accepted Answer

A) True 
 B)False

Increased acidity at the tissue cells stimulates increased dissociation of oxyhaemoglobin.

Which of the following does NOT promote elastic recoil of the lungs?

The most important factor that determines the extent to which haemoglobin is saturated with oxygen is the blood P_O2.

Where are the stretch receptors for the Breuer-Hering reflex located?

The subjective sensation of not getting enough air is known as ____________________.

Both the respiratory system and the circulatory system are involved in the process of respiration.

What does it mean to say that haemoglobin is fully saturated?

A drop in the oxygen levels in arterial blood ____________________ the central chemoreceptors.

If 20 percent of the air is composed of O₂, what is the partial pressure of oxygen at sea level where atmospheric pressure is 760 mmHg?

Without pulmonary surfactant, which one of these actions would happen?

Intrapleural pressure is usually less than atmospheric pressure.

The ____________________ serves as a common passageway for both the respiratory and digestive systems.

Which of these statements does NOT correctly describe the partial pressure of oxygen in the pulmonary veins?

___________________ is normally the most important input in regulating the magnitude of ventilation under resting conditions.

The VRG consists of and neurons.

____________________ refers to a collapsed lung.

Which structure serves as a common passageway for both the respiratory and the digestive systems?

Stimulation of the sympathetic nervous system and release of epinephrine lead to an increase in airway resistance.

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

Increased acidity at the tissue cells stimulates increased dissociation of oxyhaemoglobin.

Which of the following does NOT promote elastic recoil of the lungs?

The most important factor that determines the extent to which haemoglobin is saturated with oxygen is the blood PO2.

Where are the stretch receptors for the Breuer-Hering reflex located?

The subjective sensation of not getting enough air is known as ____________________.

Both the respiratory system and the circulatory system are involved in the process of respiration.

What does it mean to say that haemoglobin is fully saturated?

A drop in the oxygen levels in arterial blood ____________________ the central chemoreceptors.

If 20 percent of the air is composed of O2, what is the partial pressure of oxygen at sea level where atmospheric pressure is 760 mmHg?

Without pulmonary surfactant, which one of these actions would happen?

Intrapleural pressure is usually less than atmospheric pressure.

The ____________________ serves as a common passageway for both the respiratory and digestive systems.

Which of these statements does NOT correctly describe the partial pressure of oxygen in the pulmonary veins?

___________________ is normally the most important input in regulating the magnitude of ventilation under resting conditions.

The VRG consists of ____________________ and ____________________ neurons.

____________________ refers to a collapsed lung.

Which structure serves as a common passageway for both the respiratory and the digestive systems?

Stimulation of the sympathetic nervous system and release of epinephrine lead to an increase in airway resistance.

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

The most important factor that determines the extent to which haemoglobin is saturated with oxygen is the blood P_O2.

If 20 percent of the air is composed of O₂, what is the partial pressure of oxygen at sea level where atmospheric pressure is 760 mmHg?

The VRG consists of and neurons.