immune system quiz

Which of the following is a characteristic of a secondary immune response?

A secondary immune response lasts longer than a primary immune response.

________ are substances that can trigger the adaptive defenses and provoke an immune response.

Antigens

which type of cell is involved in adaptive immunity?

B cells

AIDS is such a deadly disease because the AIDS virus attacks and destroys

CD4+ T cells

What is the second step of T cell activation?

Co-stimulation

MHC proteins are also called

HLA

The immunoglobulin found in a mother's milk is

IgA

which type of surface marker is present on every nucleated cell in your body?

MHC-I

________ is the property of lymphocytes that prevents them from attacking the body's own cells.

Self-tolerance

All of the following are part of our antigen specific defense mechanisms except:

acute inflammation

Humoral immunity is provided by:

antibodies

The proteins secreted by plasma cells are called

antibodies

Your body has millions of different antibodies for detecting millions of different antigens because

antibody genes undergo somatic rearrangement and somatic mutation

A vaccination works to establish:

artificial active immunity.

Diseases in which a person's immune system attacks the person's own normal tissue are called

autoimmune diseases

Self-reactive B cells are eliminated in the

bone marrow

Which type of T cell lyses cells that have been infected with viruses?

cytotoxic T cells

Which of the following is not a sign of inflammation? - Swelling - Redness - Pain - Fever

fever

The secretion of antibodies by lymphocyte B cells provides

humoral immunity

All of the following cells are phagocytic except for

lymphocytes

Activated helper T cells release regulatory molecules called

lymphokines

Which of the following actually kills invading microbes?

lysozymes stomach acid intestinal enzymes all of the above

Precursors of macrophages are called

monocytes

Which of the following cells participate in nonspecific defense responses when your body is invaded by microbes?

natural killer cells macrophages neutrophils all of the above

When a B cell encounters antigen to which it is targeted, it divides rapidly and produces

plasma cells

Cytotoxic T cells are called into action by the:

presence of interleukin-2

Memory cells

provide an accelerated immune response upon second exposure to a particular antigen

The first step in inflammation is:

tissue injury

The inflammatory response includes all of the following except (temperature increase increased blood flow phagocyte attack)

vessel constriction