lab quiz 6 answers

Antigens that can provoke an immune response include ________. A. foreign proteins, polysaccharides, and small molecules, called haptens that link to our own body proteins B. foreign proteins C. polysaccharides D. small molecules, called haptens that link to our own body proteins

A. *foreign proteins, polysaccharides, and small molecules, called haptens that link to our own body proteins*

Select the mechanism below that is not involved in the flow of lymph through the lymphatic vessels. A. milking action of skeletal muscles B. pumping action of the heart C. pressure changes in the thorax that occur during breathing

B. *pumping action of the heart*

B cells provide this kind of immunity. A. cellular B. antigenic C. humoral D. clonal

C. *humoral*

Although all of the organs below can raise an immune response, only this one filters the lymph. A. tonsils B. spleen C. lymph nodes

C. *lymph nodes*

The functions of the lymph system include all of the following except ________. A. filtering the lymph fluid B. returning tissue fluid to the systemic circulatory system C. removing worn out erythrocytes from the system D. protecting the body from foreign substances

C. *removing worn out erythrocytes from the system*

What causes the flow of lymph to slow within lymph nodes? A. Afferent vessels are much larger in diameter than efferent vessels. B. Valves at the exit site regulate lymph flow, allowing only small amounts out at a time. C. There are more afferent vessels than efferent vessels. D. Afferent vessels contract, restricting lymph flow.

C. *there are more afferent vessels than efferent vessels*

The ________ receives lymph from the left half of the body and part of the right side as well. A. right lymphatic duct B. right subclavian vein C. thoracic duct D. cisterna chili

C. *thoracic duct*

Germinal centers in the cortex of lymph nodes contain primarily ________. A. T cells B. support cells C. macrophages D. B cells

D. *B cells*

This medullary region of the lymph node contains primarily ________. A. support cells B. B cells C. T cells D. macrophages

D. *macrophages*

What is not true about antibodies?

they are found in plasma and other body secretions *they are cells* they bind to a single, specific antigen they are produced by plasma cells