Adaptive Immunity

Adaptive immunity involves the response of ________.

• skin barriers

• B and T lymphocytes

• lysozyme

• mucous membranes

Helper T cells ________.

• secrete antibodies

• function in allergic reactions

• directly destroy target cells

• activate B cells and other T cells

Cell surface markers involved in immune reactions ________.

• are the result of genetic expression

• function in recognition of self molecules

• receive and transmit chemical messages among other cells of the system

• All of the choices are correct.

The major histocompatibility complex is ________.

• glycoproteins, called MHC antigens, found on all body cells

• a set of genes that code for MHC glycoproteins

• found on the third chromosome

• located in the thymus gland

• All of the choices are correct.

Class I MHC genes code for ________.

• certain secreted complement components

• self receptors recognized by T lymphocytes

• all HLA antigens

• receptors located primarily on macrophages and B cells

The molecular fragment on an antigen molecule that a lymphocyte recognizes and responds to is called a(n) ________.

• epitope

• hapten

• antigen binding site

• variable region

Which of the following is not a property of B cells?

• Produce plasma cells and memory cells

• Require antigen presented with MHC proteins

• Receptors called immunoglobins

Antigen-presenting cells ________.

• include dendritic cells

• are only found in the blood

• do not interact with T cells

• are a type of B cell

The immunoglobulin class that has a dimer form found in mucus, saliva, colostrum, and other body secretions is ________.

• IgA

• IgD

• IgE

• IgG

• IgM

An example of artificial active immunity would be ________.

• chickenpox infection followed by lifelong immunity

• chickenpox vaccine which triggers extended immunity to chickenpox

• giving a person immune serum globulins to chickenpox virus after exposure to the disease

• a fetus acquiring maternal IgG to the chickenpox virus across the placenta

• None of the choices are correct.