Question 1

Match between columns
                        Premises: Cytotoxic cells
Bone marrow stem cells
B cell
T helper cells
Dendritic cells

Accepted Answer

The Answer of Progenitor of all lymphocytes and CD8 and is...

Question 2

The enzyme found in tears that can digest bacterial cell walls is called:

Accepted Answer

A)   protease.
B)   lysozyme.
C)   interferon.
D)   cytokine.
E)   defensin.

Question 3

Briefly explain why allergies, such as hay fever, are characterized as a hypersensitive immune response.

Accepted Answer

Allergies are characterized by...

Question 4

Match between columns
                        Premises: role in maturation of B cells
plays a role in allergic reactions
defends against inhaled and ingested pathogens
prevents viruses and bacteria from attaching to epithelial surfaces
defends against parasitic worms
crosses the placenta to convey passive immunity to the fetus/newborn
first antibody made in the human immune response
make up 75% of circulating antibodies

Accepted Answer

The Answer of IgG and IgM and IgD and IgA is...

Question 5

B cells:

Accepted Answer

A)   are produced in the adult spleen.
B)   lyse bacterial cell walls by secreting digestive enzymes.
C)   can become plasma cells, which produce interleukins.
D)   undergo clonal reproduction once activated.
E)   stimulate apoptosis.

Question 6

Which of the following is a specific defense mechanisms or barriers used by an animal?

Accepted Answer

A)   acid secretions of the stomach
B)   inflammation
C)   antibodies
D)   mucus in the respiratory tract
E)   skin

Question 7

____ are responsible for cell mediated immunity.

Accepted Answer

A)   Natural killer cells
B)   Monocytes
C)   T lymphocytes
D)   B cells
E)   Macrophages

Question 8

An antigen is:

Accepted Answer

A)   a phagocytic cell.
B)   used to combat infections.
C)   a molecule used by bacteria to destroy antibodies.
D)   any molecule that is recognized as foreign by the immune system.
E)   any molecule that is recognized as natural by the immune system.

Question 9

If our bodies are capable of secondary responses, how do people contract influenza more than once?

Accepted Answer

A)   Memory cells lose their ability to recognize antigens after six months.
B)   The affinity of antibodies diminishes in the secondary response.
C)   New varieties of flu virus continuously evolve.
D)   Our bodies cannot launch a strong enough immune response against the flu virus.
E)   There are no effective vaccinations for the flu.

Question 10

Normally, complement proteins are active until the body is exposed to antigen.

Accepted Answer

A) True 
 B)False

Question 11

In antibody-mediated immunity, what happens immediately after B cells are activated?

Accepted Answer

A)   The foreign antigen-MHC complex is displayed on the cell surfaces.
B)   Activated T helper cells interact with the B cells.
C)   The B cells are cloned.
D)   Antibodies combine with antigens on the pathogen surface.
E)   The B cells becomes plasma cells.

Question 12

Figure 45-1  The immune system component with a principal role at point B in the accompanying figure is:

Accepted Answer

A)   memory cells.
B)   IgM antibodies.
C)   IgG antibodies.
D)   cytotoxic T cells.
E)   antibody IgA.

Question 13

Fever helps the body fight infection in which of the following ways?

Accepted Answer

A)   Increased body temperature decreases phagocytosis.
B)   Fever causes the creation of lysosomes.
C)   Fever inhibits the growth of some microorganisms.
D)   Fever reduces lymphocyte activity.
E)   Fever increases capillary permeability.

Question 14

You had a cold last month and you caught another one this month from your daughter. What is the most likely cause of this?

Accepted Answer

A)   Memory cells were not formed as a response to the first cold.
B)   The antibodies formed as a response to the first cold were degraded.
C)   The two cold viruses are significantly different.
D)   Your T cells are not working properly.
E)   Your antigen-presenting cells do not recognize the second cold virus.

Question 15

In cell-mediated immunity, what happens immediately after the infected cell displays the antigen-MHC complex?

Accepted Answer

A)   A virus invades the cell.
B)   Specific T cytotoxic cells are activated.
C)   Effector T cytotoxic cells migrate to the infection site.
D)   Cytokines are released by T helper cells.
E)   Enzymes destroy the target cells.

Question 16

Which of the following cell types is long lived and continues to produce antibody?

Accepted Answer

A)   cytotoxic T cells
B)   memory B cells
C)   T helper cells
D)   plasma cells
E)   macrophages

Question 17

Which of the following is a type of cytokine?

Accepted Answer

A)   complement protein
B)   mast cell
C)   immunoglobulin
D)   lysozyme
E)   tumor necrosis factor

Question 18

A large group of molecules involved in signaling and regulation of defense responses are:

Accepted Answer

A)   complement.
B)   prostaglandins.
C)   opsonins.
D)   cytokines.
E)   histamines.

Question 19

Allergy is a ____ response to ____ antigens.

Accepted Answer

A)   hypersensitive; environmental
B)   hyposensitive; cellular
C)   normal level; microbial
D)   mixed; protein
E)   mixed; microbial

Exam 45: The Immune System Internal Defense

Which of the following is a type of cytokine?

Correct Answer
verified

If our bodies are capable of secondary responses, how do people contract influenza more than once?

Correct Answer
verified

Match the antibody class with its major function or location.

In cell-mediated immunity, what happens immediately after the infected cell displays the antigen-MHC complex?

Correct Answer
verified

Briefly explain why allergies, such as hay fever, are characterized as a hypersensitive immune response.

Correct Answer
verified
Allergies are characterized by...
View Answer

Allergy is a response to antigens.

Correct Answer
verified

____ are responsible for cell mediated immunity.

Correct Answer
verified

Figure 45-1 The immune system component with a principal role at point B in the accompanying figure is:

Correct Answer
verified

A large group of molecules involved in signaling and regulation of defense responses are:

Correct Answer
verified

You had a cold last month and you caught another one this month from your daughter. What is the most likely cause of this?

Correct Answer
verified

An antigen is:

Correct Answer
verified

Which of the following is a specific defense mechanisms or barriers used by an animal?

Correct Answer
verified

In antibody-mediated immunity, what happens immediately after B cells are activated?

Correct Answer
verified

Match the immune cell with the appropriate description.

Normally, complement proteins are active until the body is exposed to antigen.

Correct Answer
verified

B cells:

Correct Answer
verified

Which of the following cell types is long lived and continues to produce antibody?

Correct Answer
verified

Fever helps the body fight infection in which of the following ways?

Correct Answer
verified

The enzyme found in tears that can digest bacterial cell walls is called:

Correct Answer
verified

Exam 45: The Immune System Internal Defense

Which of the following is a type of cytokine?

Correct AnswerverifiedShow Answer

If our bodies are capable of secondary responses, how do people contract influenza more than once?

Correct AnswerverifiedShow Answer

Match the antibody class with its major function or location.

In cell-mediated immunity, what happens immediately after the infected cell displays the antigen-MHC complex?

Correct AnswerverifiedShow Answer

Briefly explain why allergies, such as hay fever, are characterized as a hypersensitive immune response.

Correct AnswerverifiedAllergies are characterized by...View AnswerShow Answer

Allergy is a ____ response to ____ antigens.

Correct AnswerverifiedShow Answer

____ are responsible for cell mediated immunity.

Correct AnswerverifiedShow Answer

Figure 45-1 The immune system component with a principal role at point B in the accompanying figure is:

Correct AnswerverifiedShow Answer

A large group of molecules involved in signaling and regulation of defense responses are:

Correct AnswerverifiedShow Answer

You had a cold last month and you caught another one this month from your daughter. What is the most likely cause of this?

Correct AnswerverifiedShow Answer

An antigen is:

Correct AnswerverifiedShow Answer

Which of the following is a specific defense mechanisms or barriers used by an animal?

Correct AnswerverifiedShow Answer

In antibody-mediated immunity, what happens immediately after B cells are activated?

Correct AnswerverifiedShow Answer

Match the immune cell with the appropriate description.

Normally, complement proteins are active until the body is exposed to antigen.

Correct AnswerverifiedShow Answer

B cells:

Correct AnswerverifiedShow Answer

Which of the following cell types is long lived and continues to produce antibody?

Correct AnswerverifiedShow Answer

Fever helps the body fight infection in which of the following ways?

Correct AnswerverifiedShow Answer

The enzyme found in tears that can digest bacterial cell walls is called:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Allergies are characterized by...
View Answer

Allergy is a response to antigens.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified