Ch 22: mastering a and p

The cells that perform immunological surveillance are the ________ cells. A) NK B) plasma C) B D) helper T E) suppressor T

A) NK

________ are large lymphatic nodules that are located in the walls of the pharynx. A) Tonsils B) Peyer patches C) Lymph nodes D) Immune complexes E) Spleens

A) Tonsils

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

A) activates B cells.

Stem cells that will form B cells or NK cells are found only in the A) bone marrow. B) liver. C) spleen. D) thymus. E) kidneys.

A) bone marrow.

Histamine increases blood flow and vascular permeability. This would account for all of the following changes that occur during inflammation, except A) redness of the inflamed tissue. B) chemotaxis of phagocytes. C) heat of the inflamed tissue. D) movement of defense proteins and cells into the interstitial space. E) swelling of the inflamed tissue.

B) chemotaxis of phagocytes.

Class II MHC proteins are present in the plasma membrane only A) when plasma cells are releasing antibodies. B) in antigen-presenting cells and lymphocytes. C) when cytotoxic T cells are inhibited. D) when NK cells are activated. E) during infections.

B) in antigen-presenting cells and lymphocytes.

Various types of macrophages are derived from A) lymphocytes. B) monocytes. C) neutrophils. D) eosinophils. E) basophils.

B) monocytes.

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

B) the venae cavae.

Most of the lymph returns to the venous circulation by way of the A) right lymphatic duct. B) thoracic duct. C) cisterna chyli. D) hepatic portal vein. E) dural sinus.

B) thoracic duct.

T is to ________ as B is to ________. A) top; bottom B) thymus-dependent; bone marrow-derived C) thyroid; bowel D) non-thymus-dependent; bottom E) trabeculae; bursa

B) thymus-dependent; bone marrow-derived

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.

B) transports gases to and away from lymph nodes.

________ are clusters of lymphatic nodules deep to the epithelial lining of the small intestine. A) Tonsils B) Adenoids C) Peyer patches D) Immune complexes E) Lymph glands

C) Peyer patches

If the thymus shrank and stopped making thymosins, we would expect to see an immediate decrease in the number of A) B lymphocytes. B) NK cells. C) T cells. D) neutrophils. E) red blood cells.

C) T cells.

The primary function of the lymphatic system is A) circulation of nutrients. B) the transport of hormones. C) defending the body against both environmental hazards and internal threats. D) the production and distribution of plasma proteins. E) circulation of dissolved gases.

C) defending the body against both environmental hazards and internal threats.

An inflammatory response is triggered when A) red blood cells release pyrogens. B) T cells release interferon. C) mast cells release histamine and heparin. D) neutrophils phagocytize bacteria. E) blood flow to an area increases.

C) mast cells release histamine and heparin.

Leslie has a bad sore throat and the lymph nodes in her neck are swollen. This would indicate that A) the focus of the infection is the lymph nodes. B) lymph is not flowing through these lymph nodes. C) the affected lymph nodes contain an increased number of lymphocytes. D) the lymph node is actively producing phagocytes. E) the lymph node has increased its secretion of thymosin.

C) the affected lymph nodes contain an increased number of lymphocytes.

Lymphocytes that destroy foreign cells or virus-infected cells are ________ cells. A) B B) plasma C) helper T D) cytotoxic T E) suppressor T

D) cytotoxic T

T cells and B cells can be activated only by A) pathogens. B) interleukins, interferons, and colony-stimulating factors. C) cells infected with viruses, bacteria, or cancer cells. D) exposure to a specific antigen at a specific site in a plasma membrane. E) disease-causing agents.

D) exposure to a specific antigen at a specific site in a plasma membrane.

Suppressor T cells act to A) suppress antigens. B) erase memory T cells. C) limit antigen proliferation. D) inhibit T and B cell activities. E) produce antibodies involved in autoimmunity.

D) inhibit T and B cell activities.

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

D)complement.

Characteristics of adaptive defenses include A) versatility. B) tolerance. C) memory. D) specificity. E) All of the answers are correct.

E) All of the answers are correct.

Examples of physical barriers against pathogens include A) sebaceous glands. B) mucus. C) epithelia. D) epidermal layers. E) All of the answers are correct.

E) All of the answers are correct.

Innate defenses include A) phagocytic cells. B) physical barriers. C) inflammation. D) interferons. E) All of the answers are correct.

E) All of the answers are correct.

The body's innate defenses include all of the following, except A) the skin. B) complement. C) interferon. D) inflammation. E) antibodies.

E) antibodies.

In passive immunization, the A) immune system attacks normal body cells. B) body is deliberately exposed to an antigen. C) body receives antibodies produced by other humans. D) body receives antibodies produced by an animal. E) body receives antibodies produced by other humans or by an animal.

E) body receives antibodies produced by other humans or by an animal.

T Lymphocytes are produced and stored in all of the following, except A) the thymus. B) lymphatic nodules. C) lymph node organs. D) the spleen. E) the brain.

E) the brain.

CD8 markers are to ________ T cells as CD4 markers are to ________ T cells.

cytoxic, suppressor