Question 1

When a T cell is activated by an antigen,it will most likely

Accepted Answer

A)  secrete antibodies. 
B)  proliferate. 
C)  die. 
D)  become a B cell. 
E)  become a plasma cell. 
A)  secrete antibodies. 
B)  proliferate. 
C)  die. 
D)  become a B cell. 
E)  become a plasma cell.

Question 2

The bacteria and fungi that live on our body's surfaces but do not cause disease (and often perform essential roles in defense and other activities)are known collectively as _______.

Accepted Answer

The answer of The bacteria and fungi that live on...

Question 3

Virally infected cells often produce small amounts of antimicrobial proteins known as _______ that increase the resistance of neighboring cells to infection.

Accepted Answer

The answer of Virally infected cells often produce small amounts...

Question 4

Cruise ship passengers find themselves fighting flulike symptoms for the first four or five days of their trip,but eventually they recover.Which is the last defensive component involved in their recovery?

Accepted Answer

A)  Antibodies 
B)  Lysozymes 
C)  Phagocytosis 
D)  The nonspecific defense provided by the skin 
E)  Mucus 
A)  Antibodies 
B)  Lysozymes 
C)  Phagocytosis 
D)  The nonspecific defense provided by the skin 
E)  Mucus

Question 5

The clonal selection of B cells results in

Accepted Answer

A)  changes in antibody shapes to match different antigens. 
B)  an individual's possessing only one type of B cell. 
C)  many genetically identical copies of the initial naïve B cell that recognized an antigen. 
D)  the production by each B cell clone of antibodies with multiple antigen specificities. 
E)  the selection of B cells that recognize self antigens. 
A)  changes in antibody shapes to match different antigens. 
B)  an individual's possessing only one type of B cell. 
C)  many genetically identical copies of the initial naïve B cell that recognized an antigen. 
D)  the production by each B cell clone of antibodies with multiple antigen specificities. 
E)  the selection of B cells that recognize self antigens.

Question 6

Harmful organisms and viruses that can cause disease are collectively known as _______.

Accepted Answer

The answer of Harmful organisms and viruses that can cause...

Question 7

Many passengers on a cruise ship at sea are suffering from flulike symptoms.Which component of the immune system will protect the passengers from becoming sick from the same viral strain the next time they are exposed?

Accepted Answer

A)  Antibodies 
B)  Lysozymes 
C)  Mucus 
D)  Complement proteins 
E)  Defensins 
A)  Antibodies 
B)  Lysozymes 
C)  Mucus 
D)  Complement proteins 
E)  Defensins

Question 8

Which is not an opportunistic infection or cancer often associated with AIDS?

Accepted Answer

A)  Kaposi's sarcoma 
B)  Pneumocystis pneumonia 
C)  Epstein-Barr virus 
D)  Lymphoma 
E)  Breast cancer 
A)  Kaposi's sarcoma 
B)  Pneumocystis pneumonia 
C)  Epstein-Barr virus 
D)  Lymphoma 
E)  Breast cancer

Question 9

Lymphocytes that are specific for certain antigens proliferate by a process known as

Accepted Answer

A)  effector selection. 
B)  clonal activation. 
C)  recognition. 
D)  monoclonal formation. 
E)  clonal selection. 
A)  effector selection. 
B)  clonal activation. 
C)  recognition. 
D)  monoclonal formation. 
E)  clonal selection.

Question 10

HIV can be transmitted from person to person by all of the following except

Accepted Answer

A)  blood. 
B)  semen. 
C)  vaginal fluid. 
D)  breast milk. 
E)  sneezing. 
A)  blood. 
B)  semen. 
C)  vaginal fluid. 
D)  breast milk. 
E)  sneezing.

Question 11

The simplest immunoglobulins have _______ polypeptide chain(s).

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  six 
A)  one 
B)  two 
C)  three 
D)  four 
E)  six

Question 12

Which statement about T cells is true?

Accepted Answer

A)  The T cell receptor is an immunoglobulin. 
B)  The T cell receptor has two chains. 
C)  T cell receptors bind to intact antigens. 
D)  The T cell receptor is secreted. 
E)  The T cell receptor lacks variable regions. 
A)  The T cell receptor is an immunoglobulin. 
B)  The T cell receptor has two chains. 
C)  T cell receptors bind to intact antigens. 
D)  The T cell receptor is secreted. 
E)  The T cell receptor lacks variable regions.

Question 13

Use the following to answer questions :
Refer to the diagram below showing a receptor on a cell.  
-Which of the following binds to the region of the receptor indicated by the arrow?

Accepted Answer

A)  Antigen only 
B)  MHC protein only 
C)  Antigen‒MHC complex 
D)  Allergen 
E)  Antibody 
A)  Antigen only 
B)  MHC protein only 
C)  Antigen‒MHC complex 
D)  Allergen 
E)  Antibody

Question 14

T cells mature in

Accepted Answer

A)  the thymus. 
B)  lymph nodes. 
C)  bone marrow. 
D)  the spleen. 
E)  the thoracic duct. 
A)  the thymus. 
B)  lymph nodes. 
C)  bone marrow. 
D)  the spleen. 
E)  the thoracic duct.

Question 15

A college student taking a 24-hour bus trip is surrounded by people sniffling and sneezing.This is her first exposure to the bacterial pathogen responsible for their "head cold," but she never develops any symptoms.Which is not one of the factors involved in her resistance?

Accepted Answer

A)  Mucus 
B)  Lysozymes 
C)  T cells 
D)  The nonspecific defense provided by her skin 
E)  Phagocytes 
A)  Mucus 
B)  Lysozymes 
C)  T cells 
D)  The nonspecific defense provided by her skin 
E)  Phagocytes

Question 16

Which statement about MHC proteins is false?

Accepted Answer

A)  MHC proteins are plasma membrane glycoproteins. 
B)  The major role of MHC proteins is the presentation of antigens to T cell receptors. 
C)  Class I MHC proteins are found on the surface of every nucleated cell. 
D)  Class II MHC molecules are found on the surfaces of T cells. 
E)  Class II MHC molecules are found on the surfaces of B cells. 
A)  MHC proteins are plasma membrane glycoproteins. 
B)  The major role of MHC proteins is the presentation of antigens to T cell receptors. 
C)  Class I MHC proteins are found on the surface of every nucleated cell. 
D)  Class II MHC molecules are found on the surfaces of T cells. 
E)  Class II MHC molecules are found on the surfaces of B cells.

Question 17

Use the following to answer questions :
Refer to the experiment below,which points to blood as an important factor in adaptive immunity.  
-Suppose that in the final step of the experiment,all the animals were injected with a lethal dose of toxin from bacteria strain B rather than from strain A.What would be the most likely outcome?

Accepted Answer

A)  Only the animal on the left would die. 
B)  Only the animal on the right would die. 
C)  Only the animal in the middle would die. 
D)  Both the animal on the left and the animal in the middle would die. 
E)  None of the animals would die. 
A)  Only the animal on the left would die. 
B)  Only the animal on the right would die. 
C)  Only the animal in the middle would die. 
D)  Both the animal on the left and the animal in the middle would die. 
E)  None of the animals would die.

Question 18

Which disease is not caused by autoimmunity?

Accepted Answer

A)  Systemic lupus erythematosus (SL
E)  
B)  Rheumatoid arthritis 
C)  Type I diabetes 
D)  AIDS 
E)  Hashimoto's thyroiditis 
A)  Systemic lupus erythematosus (SL
E)  
B)  Rheumatoid arthritis 
C)  Type I diabetes 
D)  AIDS 
E)  Hashimoto's thyroiditis

Question 19

An adaptive immune response to a pathogen would include

Accepted Answer

A)  an increase in lysozyme production. 
B)  inflammation at the site of exposure. 
C)  increased flow of mucus. 
D)  recognition of infected cells by T cells. 
E)  phagocytosis of the pathogen. 
A)  an increase in lysozyme production. 
B)  inflammation at the site of exposure. 
C)  increased flow of mucus. 
D)  recognition of infected cells by T cells. 
E)  phagocytosis of the pathogen.

Question 20

The _______ region of an antibody determines its class;the _______ region determines its specificity.

Accepted Answer

A)  constant;specific 
B)  constant;variable 
C)  specific;constant 
D)  specific;variable 
E)  variable;constant 
A)  constant;specific 
B)  constant;variable 
C)  specific;constant 
D)  specific;variable 
E)  variable;constant

Exam 39: Immunology: Animal Defense Systems

When a T cell is activated by an antigen,it will most likely

The bacteria and fungi that live on our body's surfaces but do not cause disease (and often perform essential roles in defense and other activities)are known collectively as _______.

Virally infected cells often produce small amounts of antimicrobial proteins known as _______ that increase the resistance of neighboring cells to infection.

Cruise ship passengers find themselves fighting flulike symptoms for the first four or five days of their trip,but eventually they recover.Which is the last defensive component involved in their recovery?

The clonal selection of B cells results in

Harmful organisms and viruses that can cause disease are collectively known as _______.

Many passengers on a cruise ship at sea are suffering from flulike symptoms.Which component of the immune system will protect the passengers from becoming sick from the same viral strain the next time they are exposed?

Which is not an opportunistic infection or cancer often associated with AIDS?

Lymphocytes that are specific for certain antigens proliferate by a process known as

HIV can be transmitted from person to person by all of the following except

The simplest immunoglobulins have _______ polypeptide chain(s).

Which statement about T cells is true?

Use the following to answer questions : Refer to the diagram below showing a receptor on a cell. -Which of the following binds to the region of the receptor indicated by the arrow?

T cells mature in

A college student taking a 24-hour bus trip is surrounded by people sniffling and sneezing.This is her first exposure to the bacterial pathogen responsible for their "head cold," but she never develops any symptoms.Which is not one of the factors involved in her resistance?

Which statement about MHC proteins is false?

Which disease is not caused by autoimmunity?

An adaptive immune response to a pathogen would include

The _______ region of an antibody determines its class;the _______ region determines its specificity.

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cells: the Working Units of Life

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

The _ region of an antibody determines its class;the _ region determines its specificity.