question

Area where B cells become immunocompetent

answer

C) Bone marrow

question

Area where T cells become immunocompetent

answer

B) Thymus

question

Area where activated immunocompetent B & T cells recirculate

answer

E) Blood capillaries

question

Area seeded by immunocompetent B & T cells

answer

D) Lymph nodes

question

Area where antigen challenge and clonal selection are most likely to occur

answer

D) Lymph nodes

question

First line of defense

answer

A) Intact skin and mucous membranes

question

Second line of defense

answer

B) Inflammatory response

question

Third line of defense

answer

D) Immune response

question

Innate defense system

answer

C) Inflammatory response & skin & mucous membranes

question

Adaptive defense system

answer

D) Immune response

question

Enables quick and efficient response to secondary exposure to antigen

answer

E) Memory cell

question

Absence results in no immune response

answer

D) Helper T cell

question

Forms antibody producing cells

answer

B) B cell

question

Kills cancer cells and virus infected body cells

answer

C) Cytotoxic T cell

question

Slow or stops the immune response

answer

A) Regulatory T cell

question

Main antibody of both primary and secondary immune respones

answer

E) IgG (Guard the fetus)

question

Protects mucosal barries

answer

B) IgA (apple juice --> intestinal juice)

question

Involved in allergies

answer

C) IgE (Ellergies-Allergies--histamine)

question

Along with IgM, this is a B cell receptor

answer

D) IgD (D to the B--B cell)

question

First to peak during a primary immune response

answer

A) IgM (Must go 1st)

question

Virus infected cells secrete complement to "warn" other cells of the presence of virus

answer

FALSE

question

The mechanism of the "lethal hit" of cytotoxic T cells and NK cells involves a protein called perforin

answer

TRUE

question

The directional movement of cells in response to chemicals is called chemotaxis

answer

TRUE

question

Substances capable of triggering the adaptive immune system and provoking an immune response are called antigens

answer

TRUE

question

A given pathogen will provoke either a cell-mediated respone or an antigent-antibody mediated response but not both

answer

FALSE

question

Fever is seldom beneficial because it speeds up the cellular metabolic rate and will not allow antigen-antibody reactions to occur

answer

FALSE

question

Some immunocompetent cells will never be called to service in our lifetime

answer

TRUE

question

Adaptive immunity is provided only by lymphocytes that secrete antibodies

answer

FALSE

question

Somatic recombination by B cells allows each B cell to form its own unique antibody genes.

answer

TRUE

question

It is our genes, not antigens, that determine what specific foreign substances our immune system will be able to recognize and resist.

answer

TRUE

question

Which of the following is associated with passive immunity? A) exposure to an antigen B) infusion of weakened viruses C) passage of IgG antibodies from a pregnant mother to her fetus D) booster shot of vaccine

answer

C) passage of IgG antibodies from a pregnant mother to her fetus

question

The redness and heat of an inflamed area are due to a local hyperemia caused by A) Vasodilation B) Vasoconstriction C) Phagocyte mobilization D) complement production

answer

A) Vasodilation

question

Small molecules that bind with self-proteins to produce antigenic substance are called A) Haptens B) Antibodies C) Ions D) regains

answer

A) Haptens

question

Regulatory T cells ________. A) release cytokines that increase the activity of cytotoxic T cells and activated B cells B) decrease their activity as antigenic stimulus decreases C) may function in preventing autoimmune reactions D) aid B cells in antibody production

answer

C) may function in preventing autoimmune reactions

question

Select the correct definition about skin grafts A) Isografts are between identical twins B) Allografts are between different species C) Xenografts are between individuals of the same species D) Autografts are between two genetically identical individuals

answer

A) Isografts are between identical twins

question

Which of the statements below does not describe antigens? A) Antigens exhibit immunogenicity and reactivity B) Antigens only come from microbes C) the parts of the antigen moleucles that initiate immune responses are called epitopes or antigenic determinants D) Antigens can include proteins, nucleic acids, lipoproteins, glycoproteins, and certain large polysaccharides

answer

B) Antigens only come from microbes

question

Activated T cells and macrophages release ________ to mobilze immune cells and attract other leukocytes into the area A) Cytokines B) Perforines C) Interlukin-1 proteins D) Interlukin-2 protines

answer

A) Cytokines

question

Which of the following is part of the second line of defense against microorganisms? A) Kertain B) cilia C) gastric juice D) phagocytes

answer

D) phagocytes

question

T cell activation requires ________. A) antigen binding and co-stimulation B) antigen binding and antibody production C) antibody production and co-stimulation D) antigen binding, antibody production, and co-stimulation

answer

A) antigen binding and co-stimulation

question

Select the correct statement about immundeficieny A) Severe combined immunodeficient (SCID) disease is an acquired condition. B) The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins C) Hodgkin's disease is a hereditary immunodeficiency found in children D) The most common form of immunodeficiency is a graft-versus-host (GVH) disease

answer

B) The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins

question

Cytotoxic T cells ______. A) are the only t cells that can directly attack and kill other cells B) require the double recognition signal of I MHC plus II MHC on the target cell in order to function C) function mainly to stimulate the proliferation of other T cell populations D) self-destruct once the antigen has been neutralized

answer

A) are the only t cells that can directly attack and kill other cells

question

Select the correct statement about antigens A) "Self-antigens" is another name for incomplete antigens B) The largest type of antigen is called a hapten C) Only small antigens exhibit reactivity D) One antigen may have different antigenic determinants and may therefore cause the formation of more than one antibody

answer

D) One antigen may have different antigenic determinants and may therefore cause the formation of more than one antibody

question

Clonal selection of B cells A) Occurs during fetal development B) results in the formation of plasma cells C) cannot occur in the presence of antigens D) only occurs in the secondary immune response

answer

B) results in the formation of plasma cells

question

The primary immune response _________. A) occurs more rapidly and is stronger than the secondary response B) occurs when memory cells are stimulation C) is another name for immunological memory D) has a lag period while B cells proliferate and differentiate into plasma cells

answer

D) has a lag period while B cells proliferate and differentiate into plasma cells

question

Select the correct statement about the function of antibodies A) Antibodies may directly destroy "invaders" B) Neutralization is the process by which antibodies cause invading cells to clump together C) Complement fixation is the main mechanism by which antibodies provide protection D) The most potent agglutination agent is IgG

answer

C) Complement fixation is the main mechanism by which antibodies provide protection

question

Which of the following cells is the most critical cell in immunity? A) B cell B) helper T cell C) cytotoxic T cell D) APC

answer

B) helper T cell

Chapter 21 Immune system – Flashcards

Unlock all answers in this set

Haven't found what you were looking for?

Search for samples, answers to your questions and flashcards