Question 1

The primary respiratory control centre that provides output to the respiratory muscles is located in the ____________________.

Accepted Answer

medulla of

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

What factor in the arterial blood has the largest effect on increasing the rate of respiration

Accepted Answer

A) The hydrogen ion concentration in the kidney ECF increases. 
B) The partial pressure of oxygen generally drops to 90. 
C) The partial pressure of carbon increases. 
D) The hydrogen ion concentration in the ECF generally increases. 
A) The hydrogen ion concentration in the kidney ECF increases. 
B) The partial pressure of oxygen generally drops to 90. 
C) The partial pressure of carbon increases. 
D) The hydrogen ion concentration in the ECF generally increases.

Question 4

Which of these statements describes inspiratory neurons

Accepted Answer

A) They activate the phrenic nerve, bringing about contraction of the diaphragm. 
B) They are stimulated by stretch receptors. 
C) They are inhibited by the expiratory neurons. 
D) They are often inactive. 
A) They activate the phrenic nerve, bringing about contraction of the diaphragm. 
B) They are stimulated by stretch receptors. 
C) They are inhibited by the expiratory neurons. 
D) They are often inactive.

Question 5

Deep and slow breaths usually result in the greatest alveolar ventilation rates.

Accepted Answer

A) True 
 B)False

Question 6

O₂ is much more soluble in blood than CO₂ is.

Accepted Answer

A) True 
 B)False

Question 7

The tidal volume is the sum of the vital capacity, expiratory reserve volume, and inspiratory reserve volume.

Accepted Answer

A) True 
 B)False

Question 8

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 9

Which of these conditions applies to alveolar PO₂ at high altitudes

Accepted Answer

A) PO₂ is higher than normal. 
B) PO₂ is lower than normal. 
C) PCO₂ is higher than normal. 
D) PCO₂ is lower than normal. 
A) PO₂ is higher than normal. 
B) PO₂ is lower than normal. 
C) PCO₂ is higher than normal. 
D) PCO₂ is lower than normal.

Question 10

Elastic recoil refers to the tendency of the chest wall to expand.

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

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

Question 12

At the end of inspiration and at the end of expiration, intra-alveolar pressure is always equal to atmospheric pressure.

Accepted Answer

A) True 
 B)False

Question 13

Match the types of hypoxia, labelled a. through d., with the circumstances. (Options may be used more than once or not at all.)
-emphysema

Accepted Answer

A) anaemic hypoxia 
B) circulatory hypoxia 
C) histotoxic hypoxia 
D) hypoxic hypoxia 
A) anaemic hypoxia 
B) circulatory hypoxia 
C) histotoxic hypoxia 
D) hypoxic hypoxia

The primary respiratory control centre that provides output to the respiratory muscles is located in the ____________________.

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

What factor in the arterial blood has the largest effect on increasing the rate of respiration

Which of these statements describes inspiratory neurons

Deep and slow breaths usually result in the greatest alveolar ventilation rates.

O₂ is much more soluble in blood than CO₂ is.

The tidal volume is the sum of the vital capacity, expiratory reserve volume, and inspiratory reserve volume.

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

Which of these conditions applies to alveolar PO₂ at high altitudes

Elastic recoil refers to the tendency of the chest wall to expand.

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

At the end of inspiration and at the end of expiration, intra-alveolar pressure is always equal to atmospheric pressure.

Match the types of hypoxia, labelled a. through d., with the circumstances. (Options may be used more than once or not at all.) -emphysema

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System: Sensory, Autonomic, Somatic

Principles of Endocrinology: The Central Endocrine Glands

The Endocrine Glands

Muscle Physiology

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

The Reproductive System

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Exam 12: The Respiratory System

The primary respiratory control centre that provides output to the respiratory muscles is located in the ____________________.

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

What factor in the arterial blood has the largest effect on increasing the rate of respiration

Which of these statements describes inspiratory neurons

Deep and slow breaths usually result in the greatest alveolar ventilation rates.

O₂ is much more soluble in blood than CO₂ is.

The tidal volume is the sum of the vital capacity, expiratory reserve volume, and inspiratory reserve volume.

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

Which of these conditions applies to alveolar PO₂ at high altitudes

Elastic recoil refers to the tendency of the chest wall to expand.

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

At the end of inspiration and at the end of expiration, intra-alveolar pressure is always equal to atmospheric pressure.

Match the types of hypoxia, labelled a. through d., with the circumstances. (Options may be used more than once or not at all.) -emphysema

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System: Sensory, Autonomic, Somatic

Principles of Endocrinology: The Central Endocrine Glands

The Endocrine Glands

Muscle Physiology

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

The Reproductive System

Filters