Question 1

In the breathing cycle, the atmospheric pressure normally does not change.

Accepted Answer

A) True 
 B)False

Question 2

Match the lung volume/capacity terms, labelled a. through m., with the descriptions. (Options may be used more than once or not at all.)
a.vital capacity
b.respiratory rate
c.FEVS1U1B11S1U1B0
d.tidal volume
e.residual volume
f.total lung capacity
g.functional residual capacity
h.alveolar ventilation
i.pulmonary ventilation
j.inspiratory reserve volume
k.expiratory reserve volume
l.inspiratory capacity
m.anatomic dead space volume
-vital capacity + residual volume

Accepted Answer

The answer of Match the lung volume/capacity terms, labelled a....

Question 3

To produce a normal tidal volume, the expiratory muscles must be stimulated.

Accepted Answer

A) True 
 B)False

Question 4

The volume occupied by the conducting airways is known as the ____________________.

Accepted Answer

The answer of The volume occupied by the conducting airways...

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Which statement is correct for Type I alveolar cells?

Accepted Answer

A) They form the wall of the alveoli. 
B) They secrete pulmonary surfactant. 
C)  They contract during expiration to force air out of the alveoli. 
D)  They are responsible for surface tension. 
A) They form the wall of the alveoli. 
B) They secrete pulmonary surfactant. 
C)  They contract during expiration to force air out of the alveoli. 
D)  They are responsible for surface tension.

Question 7

Alveolar collapse may occur when pulmonary surfactant secretion drops.

Accepted Answer

A) True 
 B)False

Question 8

Which of these statements does NOT correctly describe carbonic anhydrase?

Accepted Answer

A) It is found in the red blood cells. 
B) It catalyzes the formation of carbonic acid from carbonic dioxide and water. 
C)  It catalyzes the formation of oxyhaemoglobin from oxygen and reduced haemoglobin. 
D)  It accelerates the reaction of carbon dioxide and water. 
A) It is found in the red blood cells. 
B) It catalyzes the formation of carbonic acid from carbonic dioxide and water. 
C)  It catalyzes the formation of oxyhaemoglobin from oxygen and reduced haemoglobin. 
D)  It accelerates the reaction of carbon dioxide and water.

Question 9

Which of these statements does NOT correctly describe PO2 in the blood?

Accepted Answer

A) It refers to the pressure exerted by the amount of oxygen in the atmosphere. 
B) It is the most important factor determining the percent saturation of haemoglobin. 
C)  It is normal in carbon monoxide poisoning. 
D)  It is highest in the pulmonary vein. 
A) It refers to the pressure exerted by the amount of oxygen in the atmosphere. 
B) It is the most important factor determining the percent saturation of haemoglobin. 
C)  It is normal in carbon monoxide poisoning. 
D)  It is highest in the pulmonary vein.

Question 10

The alveoli are encircled by capillaries.

Accepted Answer

A) True 
 B)False

Question 11

Pneumothorax develops from the accumulation of fluid in the alveoli.

Accepted Answer

A) True 
 B)False

Question 12

Which of these statements correctly describes functional residual capacity?

Accepted Answer

A) It is the extra volume of air that can be actively expired. 
B) It is the minimum volume of air remaining in the lungs even after a maximal expiration. 
C)  It is the volume of air in the lungs at the end of a normal passive respiration. 
D)  It is the volume of air entering or leaving the lungs during a single breath. 
A) It is the extra volume of air that can be actively expired. 
B) It is the minimum volume of air remaining in the lungs even after a maximal expiration. 
C)  It is the volume of air in the lungs at the end of a normal passive respiration. 
D)  It is the volume of air entering or leaving the lungs during a single breath.

Question 13

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 on O2 exchange in the lungs by replacing part of the nitrogen with helium so that the inspired air consists of 60 percent N, 19 percent He, and 21 percent O2

Accepted Answer

Question 14

Air flow through the smaller bronchioles can be adjusted by varying the contractile activity of the smooth muscle within their walls.

Accepted Answer

A) True 
 B)False

Question 15

Which of these statements does NOT correctly describe pulmonary surfactant?

Accepted Answer

A) It is secreted by Type II alveolar cells. 
B) It is deficient in newborn respiratory distress syndrome. 
C)  It promotes elastic recoil of the lungs. 
D)  The cohesive force between a water molecule and an adjacent pulmonary surfactant molecule is much lower than the cohesive force between two adjacent water molecules. 
A) It is secreted by Type II alveolar cells. 
B) It is deficient in newborn respiratory distress syndrome. 
C)  It promotes elastic recoil of the lungs. 
D)  The cohesive force between a water molecule and an adjacent pulmonary surfactant molecule is much lower than the cohesive force between two adjacent water molecules.

Question 16

O2 levels are much more closely regulated than CO2 levels in the arterial blood.

Accepted Answer

A) True 
 B)False

Question 17

Which of these statements does NOT correctly describe haemoglobin?

Accepted Answer

A) It combines with oxygen at the lungs. 
B) It contains iron. 
C)  It forms an irreversible association with oxygen. 
D)  It is located inside the red blood cell. 
A) It combines with oxygen at the lungs. 
B) It contains iron. 
C)  It forms an irreversible association with oxygen. 
D)  It is located inside the red blood cell.

Question 18

Which of these skeletal muscles is innervated by the phrenic nerve?

Accepted Answer

A) rectus abdominis 
B) diaphragm 
C)  external intercostal 
D)  sternocleidomastoid 
A) rectus abdominis 
B) diaphragm 
C)  external intercostal 
D)  sternocleidomastoid

Question 19

Which of these statements does NOT correctly describe the plateau portion of the O2-Hb curve?

Accepted Answer

A) It is within the blood PO2 range that exists at the pulmonary capillaries. 
B) It means that haemoglobin becomes almost nearly saturated in the lungs unless the pulmonary capillary PO2 falls below 60 mmHg. 
C)  It is within the blood PO2 range that exists at the systemic capillaries. 
D)  It is the range that exists at the pulmonary capillaries. 
A) It is within the blood PO2 range that exists at the pulmonary capillaries. 
B) It means that haemoglobin becomes almost nearly saturated in the lungs unless the pulmonary capillary PO2 falls below 60 mmHg. 
C)  It is within the blood PO2 range that exists at the systemic capillaries. 
D)  It is the range that exists at the pulmonary capillaries.

Question 20

Carbonic anhydrase catalyzes the formation of the oxyhaemoglobin.

Accepted Answer

A) True 
 B)False

In the breathing cycle, the atmospheric pressure normally does not change.

To produce a normal tidal volume, the expiratory muscles must be stimulated.

The volume occupied by the conducting airways is known as the ____________________.

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

Which statement is correct for Type I alveolar cells?

Alveolar collapse may occur when pulmonary surfactant secretion drops.

Which of these statements does NOT correctly describe carbonic anhydrase?

Which of these statements does NOT correctly describe P_O2 in the blood?

The alveoli are encircled by capillaries.

Pneumothorax develops from the accumulation of fluid in the alveoli.

Which of these statements correctly describes functional residual capacity?

Air flow through the smaller bronchioles can be adjusted by varying the contractile activity of the smooth muscle within their walls.

Which of these statements does NOT correctly describe pulmonary surfactant?

O₂ levels are much more closely regulated than CO₂ levels in the arterial blood.

Which of these statements does NOT correctly describe haemoglobin?

Which of these skeletal muscles is innervated by the phrenic nerve?

Which of these statements does NOT correctly describe the plateau portion of the O₂-Hb curve?

Carbonic anhydrase catalyzes the formation of the oxyhaemoglobin.

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

In the breathing cycle, the atmospheric pressure normally does not change.

To produce a normal tidal volume, the expiratory muscles must be stimulated.

The volume occupied by the conducting airways is known as the ____________________.

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

Which statement is correct for Type I alveolar cells?

Alveolar collapse may occur when pulmonary surfactant secretion drops.

Which of these statements does NOT correctly describe carbonic anhydrase?

Which of these statements does NOT correctly describe PO2 in the blood?

The alveoli are encircled by capillaries.

Pneumothorax develops from the accumulation of fluid in the alveoli.

Which of these statements correctly describes functional residual capacity?

Air flow through the smaller bronchioles can be adjusted by varying the contractile activity of the smooth muscle within their walls.

Which of these statements does NOT correctly describe pulmonary surfactant?

O2 levels are much more closely regulated than CO2 levels in the arterial blood.

Which of these statements does NOT correctly describe haemoglobin?

Which of these skeletal muscles is innervated by the phrenic nerve?

Which of these statements does NOT correctly describe the plateau portion of the O2-Hb curve?

Carbonic anhydrase catalyzes the formation of the oxyhaemoglobin.

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

Which of these statements does NOT correctly describe P_O2 in the blood?

O₂ levels are much more closely regulated than CO₂ levels in the arterial blood.

Which of these statements does NOT correctly describe the plateau portion of the O₂-Hb curve?