CH. 16 Adaptive Immunity HW

True

Cells that become activated when they bind to intracellular antigen bound to class I MHC on antigen-presenting cells are known as _cytotoxic T cells/ CD8 cells.

single B cell becomes activated when its receptor binds to a single epitope.

Clonal expansion of B cells occurs when a(n)

CD8

Cytotoxic T cells display the surface antigen ________.

CD4

Helper T cells display the surface antigen ________.

Memory B cells with receptors that match with antigen produce anti-apoptosis protein

How are memory B cells able to persist for many years?

The injection would provide antigens recognizable by the immune system and memory cells would form to prevent typhoid fever in the future.

How would you expect an injection of killed or attenuated Salmonella typhi, the causative agent of typhoid fever, to protect an individual?

antibody diversity is created within our bodies

If you had a box of 200 beads that were different shapes and you randomly chose and linked together 3 beads, you would be performing a process analogous to the way

Antibodies

Immunoglobulin proteins are also known as ________.

T cell activation

MHC molecules are required for

severe tissue damage

One health risk associated with excessive cytokine release is the chance of

Superantigens

Proteins that do not require antigen processing and presentation are referred to as ________.

TC

T cells capable of killing virus-infected and cancer cells are known as ________ cells.

Peptides

T-cell receptors (TCRs) are only able to bind

contains highly variable amino acid sequences

The antigen-binding site on an antibody

Cytokines

The small peptides released by various cells that influence the direction and intensity of an immune response are known as ________.

An APC presents antigen to helper T cells to activate the T cells during a cellular response.

What is the function of an antigen-presenting cell (APC)?

Class II MHC is used to present extracellular antigen to CD4 cells.

What is the function of class II MHC molecules?

IgG titer levels are much higher during a secondary immune response.

When comparing the primary and secondary immune responses, which of the following is true?

Individual epitopes on an antigen are recognized and a single antibody is produced for each epitope.

Which of the following accurately describes how a foreign molecule leads to the production of antibody?

A vaccine is administered for one of two viruses that share epitopes.

Which of the following statements is an example of a situation in which cross-protection will occur?

activation of cytotoxic T cells

Which of the following would most directly eliminate an intracellular pathogen such as a virus?

Antibodies are only able to bind to extracellular antigen, and viruses tend to be intracellular.

Why are cytotoxic T (TC) cells more effective than antibodies at clearing viral infections?

T cells will bind to antigens on the surface of the APC.

A microbe is ingested and broken into fragments by an antigen-presenting cell (APC). Which of the following would you expect to occur?

IgG

A newborn receives passive immunity through

negative selection

Almost 95% of T cells entering the thymus die when apoptosis is triggered during