Exam 43: The Immune System

The number of MHC protein combinations possible in a given population is enormous. However, an individual in that diverse population has a far more limited array of MHC molecules because

Select the pathway that would lead to the activation of cytotoxic T cells.

Antibodies of the different classes IgM, IgG, IgA, IgD, and IgE differ from each other

Within a differentiated B cell, the rearrangement of DNA sequences between variable regions and joining regions is accomplished by

A systemic inflammatory response that is often life-threatening is

Bacterial infection in a previously uninfected house cat would most quickly activate its

Which of the following statements is not true?

An immune response to a tissue graft will differ from an immune response to a bacterium because

An epitope associates with which part of an antigen receptor or antibody?

-Study the table. Giving the mother anti-Rh antibodies before delivering her baby would be a wise precaution in

Use the following information to answer the next few questions. An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, at which time she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick. -Her immune system's recognition of the second infection involves the

The cells involved in innate immunity, whose absence increases the chances of developing malignant tumors, are

An inflammation-causing signal released by mast cells at the site of an infection is

The ability of one person to produce over a million different antibody molecules does not require over a million different genes; rather, this wide range of antibody production is due to

Clonal selection is an explanation for how

-According to the graph, naive B cells will produce effector cells

The primary function of humoral immunity is

Secondary immune responses upon a second exposure to a pathogen are due to the activation of

Naturally acquired passive immunity results from the

Most newly emerging diseases result in