Exam 14: The Lymphatic System and Immunity

Inappropriate or excessive immune responses to antigens are defined as

-What does label A represent?

Choose the most accurate characteristic of Class II MHC proteins.

The human immunodeficiency virus (HIV)that causes the disease known as AIDS selectively infects ________,which leads to clinical problems.

Which is the action of histamine?

Within lymph nodes,fixed macrophages and dendritic cells remove at least ________ percent of antigens arriving in lymph.

During a typical immune response,activated B cells mature into cells that produce ________,which bind(s)to and attack(s)foreign invaders.

Which of the following is an example of a Type IV allergy?

Blocking the antigen receptors on the surface of lymphocytes would interfere with

NK cells secrete ________,which kills an abnormal cell by creating large pores in its plasma membrane.

The ________ form the base of a typical antibody molecule.

The spleen is

Virus-infected cells release

The increased incidence of cancer in the elderly reflects the fact that

Immunoglobulins that can bind to antigens,stimulating basophils and mast cells,are called ________ antibodies.

When an antigen triggers an immune response,it usually activates ________ first.

The clumping of red blood cells,which occurs when incompatible blood types are mixed,is an example of

________ is the ability to produce a normal immune response upon exposure to an antigen.

A virus is injected into a rabbit and the rabbit is allowed to make antibodies against the viral antigen.These antibodies are then removed from the rabbit plasma and injected into a human to combat an infection by the same virus.This would be an example of

________ are macrophages found in and around blood channels in the liver.