2/10 Ch. 20 Section 1

Lymphatic vessels commonly occur in association with hyaline cartilage. sensory nerve endings. blood vessels. adipose tissue. both hyaline cartilage and adipose tissue.

blood vessels.

The primary function of the lymphatic system is circulation of nutrients. defending the body against both environmental hazards and internal threats. the transport of hormones. the production and distribution of plasma proteins. both the transport of hormones and the production and distribution of plasma proteins.

defending the body against both environmental hazards and internal threats.

The lymphocytes are most important in fighting infection. transporting gases to and away from lymph nodes. transporting lipids from the digestive tract. helping maintain normal blood volume. eliminating variations in the composition of interstitial fluid.

fighting infection.

Which class of leukocytes is particularly abundant in the red pulp of the spleen? neutrophils T lymphocytes red blood cells B lymphocytes free and fixed macrophages

free and fixed macrophages

Lymph nodes do all of the following except remove excess nutrients from the lymph. remove debris and pathogens from the lymph. produce antibodies. detect pathogens. monitor the contents of lymph.

remove excess nutrients from the lymph.

Lymphocytes respond to antigens. are primarily found in red bone marrow. decrease in number during infection. are all actively phagocytic. destroy red blood cells.

respond to antigens.

Most of the lymph returns to the venous circulation by way of the cisterna chyli. right lymphatic duct. dural sinus. thoracic duct. hepatic portal vein.

thoracic duct.

T is to ________ as B is to ________. non-thymus-dependent; bottom thymus-dependent; bone marrow-derived thyroid; bowel top; bottom None of the answers is correct.

thymus-dependent; bone marrow-derived

Stem cells that will form T cells develop in the kidneys. thymus. liver. spleen. bone marrow.

thymus.

Areas of the spleen that contain large aggregations of lymphocytes are known as adenoids. Peyer's patches. lymph nodes. red pulp. white pulp.

white pulp.

In general, lymphocytes have one nucleus. spend most of their time in lymphoid tissue. have relatively long life spans. All of the answers are correct. None of the answers is correct.

All of the answers are correct.

Lymphocyte production involves thymus tissue. bone marrow. peripheral lymphoid tissues. All of the answers are correct. None of the answers is correct.

All of the answers are correct.

Lymphoid organs differ from lymphoid tissues in what way? They are found in the digestive tract and lymphoid tissues are found in the thorax. They contain T lymphocytes and lymphoid tissues do not. They cannot produce antibodies, whereas lymphoid tissues can. They are surrounded by a fibrous capsule and lymphoid tissues are not. None of the answers is correct.

They are surrounded by a fibrous capsule and lymphoid tissues are not.

A substance that provokes an immune response is called a(n) complement. chemotoxin. irritant. thymosin. antigen.

antigen.