Immunity Chapter 07 Quiz

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Questions and Answers

Neutrophils

produce antibodies.
are elevated during an allergic response.
produce histamine.
are phagocytic cells. (correct)

Which cells are required to process and present antigens from foreign material as the initial step in the immune response?

Eosinophils
Macrophages (correct)
T-helper cells
Monocytes

Humoral immunity is mediated by

B lymphocytes (B cells). (correct)
neutrophils.
natural killer cells.
T lymphocytes (T cells).

A secondary immune response differs from the primary immune response in that

it is more rapid than the primary response and results in higher antibody levels. (A) Signup and view all the answers

Which type of immunity is provided by a vaccination?

Active artificial (A) Signup and view all the answers

When an allergen binds with IgE antibodies on mast cells, resulting in release of chemical mediators, this reaction is called

type I hypersensitivity. (A) Signup and view all the answers

The role of memory cells is to

recognize the antigen and stimulate the immune response. (A) Signup and view all the answers

Which statement applies to contact dermatitis?

A type IV reaction occurs in affected areas. (A) Signup and view all the answers

Which of the following causes anaphylaxis?

A severe, systemic allergic reaction (C) Signup and view all the answers

Following a positive HIV antibodies blood test and ELISA test, what is the test commonly used for confirmation?

Western blot test (B) Signup and view all the answers

Incompatible blood transfusions result in

hemolysis of erythrocytes. (C) Signup and view all the answers

An autoimmune disease is

failure of the immune system to distinguish self from nonself. (D) Signup and view all the answers

Systemic lupus erythematosus is caused by

immune complex deposits of antinuclear antibodies. (B) Signup and view all the answers

Distinguishing clinical features of systemic lupus erythematosus include

inflammation in multiple organs. (B) Signup and view all the answers

Which of the following are the target cells for HIV?

Helper T lymphocytes (CD4 lymphocytes) (A) Signup and view all the answers

A diagnosis of HIV positive means that

the virus and its antibodies are present in the blood. (A) Signup and view all the answers

HIV infection impairs

both humoral and cell-mediated immunity. (C) Signup and view all the answers

Immunodeficiencies may result in an increased risk of infections by normally harmless microorganisms. These infections are referred to as

opportunistic. (D) Signup and view all the answers

Serious infections frequently occurring in patients with AIDS include

1, 2 (B) Signup and view all the answers

Which of the following statements does NOT apply to major histocompatibility complex (MHC) proteins or molecules?

All members of a family have identical MHCs. (B) Signup and view all the answers

CD4-positive helper T cells function by

facilitating all immune system activity. (C) Signup and view all the answers

Host-versus-graft disease refers to

transplant rejection by the recipient's immune system. (A) Signup and view all the answers

Which of the following complications does NOT occur frequently in AIDS patients?

Polyarthritis (D) Signup and view all the answers

Which of the following characteristics apply to HIV?

2, 4 (D) Signup and view all the answers

In cases of HIV infection, the "window period" refers to the time between

Signup and view all the answers

Which cells process and present antigens from foreign material as the initial step in the immune response?

Macrophages (B) Signup and view all the answers

Which of the following is mediated by B lymphocytes (B cells)?

B lymphocytes (B cells) (C) Signup and view all the answers

Flashcards

Neutrophils

Phagocytic cells that ingest pathogens.

Antigen processing cells

Cells that present foreign antigens to initiate immune response.