CH13 HW

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

Cell surface markers involved in immune reactions ________.

are the result of genetic expression, function in recognition of self molecules, receive and transmit chemical messages among other cells of the system, aid in cellular development.

Destruction of lymphocytes with self specificity is called ________.

clonal deletion

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

Lymphocyte maturation involves ________.

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

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

plasma cells

What type of cells secrete antibodies?

plasma cells

Lymphocytes ________.

possess MHC antigens for recognizing self, have membrane receptors that recognize foreign antigens, gain tolerance to self by destruction of lymphocytes that could react against self, develop into clones of B and T cells with extreme variations of specificity

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