BIOS 225 Test 3 - –Answer plasma cells 2. The immunoglobulins f...

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BIOS 225 Test 3

• What types of cells secrete antibodies?

–Answer plasma cells

• The immunoglobulins found on the surface of B cells are?

–Answer IgM and IgD

• Class II MHC genes code for

–Answer receptors located primarily on macrophages and B cells

• The molecular fragment on an antigen molecule that a lymphocyte recog- nizes and

responds to is called an –Answer epitope

• superantigens are

–Answer bacterial toxins that activate T cells at a 100 times greater rate than other antigens

• Which process involves antibodies covering surface receptors on a virus or toxin molecule

thereby disrupting their activity?–Answer neutralization

• The major histocompatibility complex is

–Answer a set of genes that code for MHC glycoproteins

• A foreign molecule that causes a specific immune response is an

–Answer antigen

• An example of natural active immunity would be 1 / 2

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–Answer Chickenpox infection fol- lowed by lifelong immunity.

• Each fragment of an antibody molecule contains the variable regions of a heavy

and light chain that folds into a groove for one epitope –Answer Fab

• Selective toxicity refers to

–Answer Damage to the target organisms but not host cells

• Biochemical tests include all of the following except

–Answer colony morphology

• Which process involves antibodies coating microorganisms in order to facilitate

phagocytosis?–Answer Opsonization

• Small foreign molecules that are too small by themselves to elicit an immune response are

termed –Answer Hapten

• Which of the following is not a target for T cells?

–Answer Bacteria

• A superinfection results from

–Answer decrease in most normal flora with overgrowth of an unaffected species

• The drug used for several protozoan infections is

–Answer Metronidazole

• Which of the following is incorrect about inflammation?
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