Ch 22 Lymphatic System

The cells responsible for cellular immunity are the _____ cells.

cytotoxic T

Immunity that is genetically determined and present at birth is called _____ immunity.

innate

The release of interleukin-1 by active macrophages would

produce a fever

The cells responsible for humoral immunity are the _____ cells.

B

The medullary cords of a lymph node contain _____ cells.

B

Lymphocytes are located in each of the following tissues or organs, except the A) tonsils. B) spleen. C) lymph nodes. D) brain. E) thymus gland.

Brain

Stem cells that will form T cells are modified int the

Thymus

The term lymphadenopathy refers to

a chronic or excessive enlargement of lymph nodes

All of the following are true of the thymus gland, except that it A) activates B cells. B) reaches its greatest size relative to body size during the first to second year of life. C) undergoes involution after puberty. D) produces T cells. E) lies behind the sternum in the anterior mediastinum.

activates B cells

Immunity that results from the natural exposure to an antigen in the environment is called _____ immunity.

active

The classic pathway of complement fixation occurs when C1 binds to

an antibody attached to an antigen

Compared to blood capillaries, lymph capillaries exhibit all of the following, except that they A) have no basement membrane. B) are larger in diameter. C) have walls of endothelial cells that overlap like shingles. D) are not held in place by a loose connective-tissue framework. E) are frequently irregular in shape.

are not held in place by a loose connective tissue framework

In active immunization, the

body is deliberately exposed to an antigen

Stem cells that will form B cells and NK cells are found in the

bone marrow

Each of the following is a physical barrier to infection, except A) body hair. B) epithelium. C) secretions. D) complement. E) basement membranes.

complement

Lymphocytes that attack foreign cells or body cells infected with viruses are _____ cells.

cytotoxic T

The effects of activating the complement system include all of the following, except A) destruction of target cell membranes. B) stimulation of inflammation. C) deactivation of the immune response. D) opsonization. E) chemotaxis.

deactivation of the immune response

Suppressor T cells act to

depress the responses of the other T and B cells

Cells that help regulate the immune response are _____ cells.

helper T

The "white pulp" of the spleen is composed of

lymphocytes

The "red pulp" of the spleen contains large numbers of

macrophages

All of the various macrophages are derived from

monocytes

Immunity that results from antibodies that pass the placenta from mother to fetus is called _____ immunity.

natural passive

Microphages include

neutrophils

The first line of cellular defense against pathogens are the

phagocytes

The cells responsible for the production of circulating antibodies are _____ cells.

plasma

The cells known as lymphocytes

produce proteins called antibodies

Lymph nodes do all of the following, except that they A) produce antibodies. B) monitor the contents of lymph. C) remove debris and pathogens from the lymph. D) act as a "way station" for cancer cells. E) remove excess nutrients from the lymph.

remove excess nutrients from the lymph

Defense of the body against a particular bacteria or virus is provided by

specific immunity

In general, lymphocytes

spend little time in blood, have relatively long life spans (A & B only)

The lymphatic system is composed of all of the following, except A) lymphatic vessels. B) the thyroid gland. C) the spleen. D) lymph nodes. E) lymph

the thyroid gland

The lymphatic system does all of the following, except that it A) helps maintain normal blood volume. B) transports gases to and away from lymph nodes. C) eliminates variations in the composition of interstitial fluid. D) transports lipids from the digestive tract. E) fights infection.

transports gasses to and away from lymph nodes

Characteristics of specific defenses include

versatility, tolerance, memory, specificity, all of the above

Areas of the spleen that contain large numbers of lymphocytes are known as

white pulp