Question 1

Which of the following events initiates the process of exhalation?

Accepted Answer

A)  Expansion of the lungs 
B)  Relaxation of the diaphragm 
C)  Contraction of the diaphragm 
D)  Contraction of the intercostal (rib) muscles 
A)  Expansion of the lungs 
B)  Relaxation of the diaphragm 
C)  Contraction of the diaphragm 
D)  Contraction of the intercostal (rib) muscles

Question 2

Which of the following structures decreases diffusion distances for oxygen and carbon dioxide by delivering air directly to body cells?

Accepted Answer

A)  Bronchi 
B)  Spiracles 
C)  Tracheoles 
D)  Parabronchi 
E)  Gill filaments 
A)  Bronchi 
B)  Spiracles 
C)  Tracheoles 
D)  Parabronchi 
E)  Gill filaments

Question 3

Which of the following is a consequence of breathing secondhand smoke?

Accepted Answer

A)  Nonsmoking children of smokers are less likely to develop atherosclerosis. 
B)  Nonsmoking children of smokers are more likely to contract pneumonia. 
C)  Smokers are more likely to have increased lung capacity. 
D)  Nonsmoking spouses of smokers have a 30% lower risk of heart attack. 
A)  Nonsmoking children of smokers are less likely to develop atherosclerosis. 
B)  Nonsmoking children of smokers are more likely to contract pneumonia. 
C)  Smokers are more likely to have increased lung capacity. 
D)  Nonsmoking spouses of smokers have a 30% lower risk of heart attack.

Question 4

The respiratory control center is located in the

Accepted Answer

A)  hypothalamus. 
B)  medulla. 
C)  diaphragm. 
D)  cortex. 
E)  spinal cord. 
A)  hypothalamus. 
B)  medulla. 
C)  diaphragm. 
D)  cortex. 
E)  spinal cord.

Question 5

What three features are common to all respiratory systems?

Accepted Answer

All systems are mois

Question 6

Some fishes can extract 80% of the oxygen from water flowing through their gills through countercurrent exchange.

Accepted Answer

A) True 
 B)False

Question 7

Alveoli

Accepted Answer

A)  are blind sacs that extend from tracheae. 
B)  are not permeable to dissolved oxygen. 
C)  have a moist surface. 
D)  are found in gills. 
E)  are thick- walled. 
A)  are blind sacs that extend from tracheae. 
B)  are not permeable to dissolved oxygen. 
C)  have a moist surface. 
D)  are found in gills. 
E)  are thick- walled.

Question 8

During inhalation, the diaphragm

Accepted Answer

A)  relaxes and flattens. 
B)  contracts and flattens. 
C)  relaxes and becomes dome- shaped. 
D)  contracts and becomes dome- shaped. 
A)  relaxes and flattens. 
B)  contracts and flattens. 
C)  relaxes and becomes dome- shaped. 
D)  contracts and becomes dome- shaped.

Question 9

The function of the epiglottis is to

Accepted Answer

A)  facilitate gas exchange in the lungs. 
B)  assist the vocal cords in sound production. 
C)  produce surfactant. 
D)  keep the bronchi from collapsing. 
E)  prevent food from entering the larynx. 
A)  facilitate gas exchange in the lungs. 
B)  assist the vocal cords in sound production. 
C)  produce surfactant. 
D)  keep the bronchi from collapsing. 
E)  prevent food from entering the larynx.

Question 10

In humans, the respiratory rate is primarily regulated by levels of in the blood, which is detected by nerve cells in the respiratory center.

Accepted Answer

The answer of In humans, the respiratory rate is primarily...

Question 11

An emergency room physician has withdrawn blood from a vessel in your arm. The dark red color of the blood indicates that it was

Accepted Answer

A)  going away from the heart. 
B)  on its way to the tissues of the arm. 
C)  coming from the lungs. 
D)  taken from a vein. 
E)  taken from an artery. 
A)  going away from the heart. 
B)  on its way to the tissues of the arm. 
C)  coming from the lungs. 
D)  taken from a vein. 
E)  taken from an artery.

Question 12

How can a sponge deliver oxygen to every cell of its body without a respiratory system?

Accepted Answer

A sponge uses ciliated cells t

Exam 34: Respiration

Which of the following events initiates the process of exhalation?

Which of the following structures decreases diffusion distances for oxygen and carbon dioxide by delivering air directly to body cells?

Which of the following is a consequence of breathing secondhand smoke?

The respiratory control center is located in the

What three features are common to all respiratory systems?

Some fishes can extract 80% of the oxygen from water flowing through their gills through countercurrent exchange.

Alveoli

During inhalation, the diaphragm

The function of the epiglottis is to

In humans, the respiratory rate is primarily regulated by levels of in the blood, which is detected by nerve cells in the respiratory center.

An emergency room physician has withdrawn blood from a vessel in your arm. The dark red color of the blood indicates that it was

How can a sponge deliver oxygen to every cell of its body without a respiratory system?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity II: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

Filters