Question 1

When blood passes through systemic capillaries,the oxygen saturation of hemoglobin changes

Accepted Answer

A) from about 98% to about 75% saturated. 
B) from about 40% to about 80% saturated. 
C) from about 70% saturated to about 99% saturated. 
D) from about 99% saturated to about 25% saturated. 
A) from about 98% to about 75% saturated. 
B) from about 40% to about 80% saturated. 
C) from about 70% saturated to about 99% saturated. 
D) from about 99% saturated to about 25% saturated. A

Question 2

Relaxation of the smooth muscle within the walls of bronchioles leads to _______________.

Accepted Answer

bronchodilation

Question 3

List,in order,the structures of the respiratory membrane that carbon dioxide must cross to move from the blood into an air sac of the lung.

Accepted Answer

The carbon dioxide must pass through the pulmonary capillary endothelium,then the fused basement membrane,then the squamous cell of the alveolar wall.

Question 4

Which statement is true regarding the location of the trachea

Accepted Answer

A) It lies superior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs. 
B) It lies posterior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs. 
C) It lies anterior to the esophagus,inferior to the larynx,and inferior to the primary bronchi of the lungs. 
D) It lies anterior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs. 
E) It lies superior to the esophagus,superior to the larynx,and superior to the primary bronchi of the lungs. 
A) It lies superior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs. 
B) It lies posterior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs. 
C) It lies anterior to the esophagus,inferior to the larynx,and inferior to the primary bronchi of the lungs. 
D) It lies anterior to the esophagus,inferior to the larynx,and superior to the primary bronchi of the lungs. 
E) It lies superior to the esophagus,superior to the larynx,and superior to the primary bronchi of the lungs.

Question 5

The amount of air left in the lungs even after the most forceful expiration is referred to as the _________ volume.

Accepted Answer

The answer of The amount of air left in the...

Question 6

These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation.

Accepted Answer

A) External intercostals 
B) Scalenes 
C) Transversus thoracis 
D) Internal intercostals 
E) Serratus posterior inferior 
A) External intercostals 
B) Scalenes 
C) Transversus thoracis 
D) Internal intercostals 
E) Serratus posterior inferior

Question 7

Which type of receptor initiates the inhalation (or Hering-Breuer)reflex

Accepted Answer

A) Central chemoreceptors 
B) Baroreceptors 
C) Peripheral chemoreceptors 
D) Proprioceptors 
A) Central chemoreceptors 
B) Baroreceptors 
C) Peripheral chemoreceptors 
D) Proprioceptors

Question 8

Consistent with Boyle's law,air flows from a region of lower pressure (the atmosphere)into a region of higher pressure within the lungs.

Accepted Answer

A) True 
 B)False

Question 9

An actively contracting muscle will cause local temperature to rise and will produce acidic molecules.Warmth and lower pH cause the oxygen-hemoglobin saturation curve to shift ______ reflecting that hemoglobin releases ______ oxygen.

Accepted Answer

A) left;more 
B) left;less 
C) right;more 
D) right;less 
A) left;more 
B) left;less 
C) right;more 
D) right;less

Question 10

The depth and rate of respiration influence blood levels of hydrogen ion.

Accepted Answer

A) True 
 B)False

Question 11

The bronchial circulation is a component of the pulmonary circulation.

Accepted Answer

A) True 
 B)False

Question 12

Bronchial arteries carry _________ blood to the tissues of the lung.

Accepted Answer

A) oxygenated 
B) deoxygenated 
A) oxygenated 
B) deoxygenated

Question 13

Compared to its partial pressure at sea level,what would be the partial pressure of oxygen at an altitude with an atmospheric pressure of only 380 mm Hg (recall that sea level atmospheric pressure is 760 mm Hg)

Accepted Answer

A) Po2would be half as much as it would be at sea level. 
B) Po2would be twice as much as it would be at sea level. 
C) Po2would be one-fourth as much as it would be at sea level. 
D) Po2would be three-quarters as much as it would be at sea level. 
A) Po2would be half as much as it would be at sea level. 
B) Po2would be twice as much as it would be at sea level. 
C) Po2would be one-fourth as much as it would be at sea level. 
D) Po2would be three-quarters as much as it would be at sea level.

Question 14

The main function of serous fluid is to

Accepted Answer

A) lubricate and reduce friction between pleural membranes around the lung. 
B) improve adhesion of the lungs to the thoracic wall. 
C) facilitate the diffusion of oxygen across the respiratory membrane. 
A) lubricate and reduce friction between pleural membranes around the lung. 
B) improve adhesion of the lungs to the thoracic wall. 
C) facilitate the diffusion of oxygen across the respiratory membrane.

Question 15

Activation of sympathetic nerves that innervate lung tissue results in

Accepted Answer

A) bronchoconstriction. 
B) bronchodilation. 
A) bronchoconstriction. 
B) bronchodilation.

Question 16

Also known as the pneumotaxic center,this area allows for smooth transitions between inspiration and expiration.

Accepted Answer

A) Dorsal respiratory group 
B) Ventral respiratory group 
C) Pontine respiratory center 
D) Medullary respiratory center 
E) Carotid body 
A) Dorsal respiratory group 
B) Ventral respiratory group 
C) Pontine respiratory center 
D) Medullary respiratory center 
E) Carotid body

Question 17

The alveolar cell that secretes pulmonary surfactant is the

Accepted Answer

A) alveolar type II cell. 
B) alveolar type I cell. 
C) alveolar macrophage. 
D) dust cell. 
E) squamous alveolar cell. 
A) alveolar type II cell. 
B) alveolar type I cell. 
C) alveolar macrophage. 
D) dust cell. 
E) squamous alveolar cell.

Question 18

The pulmonary plexus is a weblike network of nerve fibers that surrounds the primary bronchi and enters the lungs at the hilum.It consists of both sympathetic and parasympathetic fibers.

Accepted Answer

A) True 
 B)False

Question 19

-Which sinus does the number 1 indicate

Accepted Answer

A) Frontal sinus 
B) Anterior sinus 
C) Ethmoidal sinus 
D) Maxillary sinus 
E) Sphenoidal sinus 
A) Frontal sinus 
B) Anterior sinus 
C) Ethmoidal sinus 
D) Maxillary sinus 
E) Sphenoidal sinus

Question 20

Bronchoconstriction results from relaxation of smooth muscle in the walls of airways.

Accepted Answer

A) True 
 B)False

Exam 23: Respiratory System

When blood passes through systemic capillaries,the oxygen saturation of hemoglobin changes

Relaxation of the smooth muscle within the walls of bronchioles leads to _______________.

List,in order,the structures of the respiratory membrane that carbon dioxide must cross to move from the blood into an air sac of the lung.

Which statement is true regarding the location of the trachea

The amount of air left in the lungs even after the most forceful expiration is referred to as the _________ volume.

These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation.

Which type of receptor initiates the inhalation (or Hering-Breuer)reflex

Consistent with Boyle's law,air flows from a region of lower pressure (the atmosphere)into a region of higher pressure within the lungs.

An actively contracting muscle will cause local temperature to rise and will produce acidic molecules.Warmth and lower pH cause the oxygen-hemoglobin saturation curve to shift ______ reflecting that hemoglobin releases ______ oxygen.

The depth and rate of respiration influence blood levels of hydrogen ion.

The bronchial circulation is a component of the pulmonary circulation.

Bronchial arteries carry _________ blood to the tissues of the lung.

Compared to its partial pressure at sea level,what would be the partial pressure of oxygen at an altitude with an atmospheric pressure of only 380 mm Hg (recall that sea level atmospheric pressure is 760 mm Hg)

The main function of serous fluid is to

Activation of sympathetic nerves that innervate lung tissue results in

Also known as the pneumotaxic center,this area allows for smooth transitions between inspiration and expiration.

The alveolar cell that secretes pulmonary surfactant is the

The pulmonary plexus is a weblike network of nerve fibers that surrounds the primary bronchi and enters the lungs at the hilum.It consists of both sympathetic and parasympathetic fibers.

-Which sinus does the number 1 indicate

Bronchoconstriction results from relaxation of smooth muscle in the walls of airways.

The Sciences of Anatomy and Physiology

Atoms,Ions,and Molecules

Energy,Chemical Reactions,and Cellular Respiration

Biology of the Cell

Tissue Organization

Integumentary System

Skeletal System: Bone Structure and Function

Skeletal System: Axial and Appendicular Skeleton

Skeletal System: Articulations

Muscle Tissue

Muscular System: Axial and Appendicular Muscles

Nervous System: Nervous Tissue

Nervous System: Brain and Cranial Nerves

Nervous System: Spinal Cord and Spinal Nerves

Nervous System: Autonomic Nervous System

Nervous System: Senses

Endocrine System

Cardiovascular System: Blood

Cardiovascular System: Heart

Cardiovascular System: Vessels and Circulation

Lymphatic System

Immune System and the Bodys Defense

Urinary System

Fluid and Electrolytes

Digestive System

Nutrition and Metabolism

Reproductive System

Development,Pregnancy,and Heredity

Filters

An actively contracting muscle will cause local temperature to rise and will produce acidic molecules.Warmth and lower pH cause the oxygen-hemoglobin saturation curve to shift reflecting that hemoglobin releases oxygen.