CH 13 HW

Lymphocyte maturation involves ________.

All of the choices are correct - hormonal signals that initiate development - B cells maturing in bone marrow sites - T cells maturing in thymus - release of mature lymphocytes to begin migration to various lymphoid organs

Cell surface markers involved in immune reactions ________.

All of the choices are correct.

Lymphocytes ________.

All of the choices are correct.

Adaptive immunity involves the response of ________.

B and T lymphocytes

The major histocompatibility complex is ________.

a set of genes that code for MHC glycoproteins

Helper T cells ________.

activate B cells and other T cells

A foreign molecule that causes an adaptive immune response is a(n) ________.

antigen

Destruction of lymphocytes with self specificity is called ________.

clonal differentiation

The molecular fragment on an antigen molecule that a lymphocyte recognizes and responds to is called a(n) ________.

epitope

The monomer subunit of immunoglobulin molecules has all the following except ________.

four antigen binding sites

Small foreign molecules that are too small by themselves to elicit an immune response are termed ________.

hapten

Properties of effective antigens include all the following except ________.

have large polymers made up of repeating subunits

The progeny cells of a B-cell clone are called ________.

plasma cells

What type of cells secrete antibodies?

plasma cells

Class II MHC genes code for ________.

receptors located primarily on macrophages and B cells

The histocompatibility complex proteins function in ________.

recognition of self

MHC molecules are found on each of the following cells except ________.

red blood cells

Plasma cells ________.

secrete antibodies

Class I MHC genes code for ________.

self receptors recognized by T lymphocytes

The region of each antibody molecule where amino acid composition is highly varied from one clone of B lymphocytes to another is the ________.

variable region