Microbio 310 Exam III

_____ are a group of proteins present in the blood that bind to and kill pathogens.

Toll receptors

Interferons

Complement proteins

B cells and T cells

B cells and T cells are produced in _____

The blood plasma

The liver

The bone marrow

The small intestine

Identify the component that is NOT part of innate immune defenses.

Skin

Cytotoxic T cells

Toll-like receptors

Mucous

T cells differ from B cells in that

B cells mature in the spleen whereas T cells mature in the thymus

B cells derive from red blood cells whereas T cells derive from white blood cells

B cells are used only for cell-mediated immunity whereas T cells are used for humoral immunity

There is only one type of B cell but several types of T cells

Initially, the fact that humans can produce billions of different antibodies, was confusing because

There is not enough room in the blood for billions of different B cells

Humans have about 1000 genes involved in antibody production

There is no need for so much antibody diversity

None of the above

The ability to make antibody quickly after second exposure to an antigen is due to?

Plasma cells

Memory cells

Specificity

Tolerance

Suppose an individual has impaired histamine release from mast cells. This individual may have lower levels of which antibody class?

IgA

IgD

IgE

IgM

Which of the following is true of B cells?

They differentiate into macrophage

The present antigens

They are responsible for cell mediated immunity

They secrete cytokines

Major Histocompatibility Complex (MHC) molecules are markers of?

Neutrophils

Self

Foreign antigen

Virally infected cells

Antibody variable regions ______. Constant regions ______ by changing shape.

Bind antigen, dissolve

Bind antigen, signal nucleus that antigen has been bound

Have enzyme activity, polymerize

Signal immune cells, fold

The cells responsible for circulating antibodies in the bloodstream are?

Helper T cells (TH)

Plasma cells

Cytotoxic T cells

NK T cells

Which of the following is true of the adaptive immune response?

B cells mostly mediate cellular immunity and T cells mostly mediate humoral immunity.

T cells can differentiate into antibody-secreting plasma cells.

A clonal population of plasma cells can produce antibodies to many different epitopes.

T cells can directly kill infected host cells but B cell cannot directly kill cells.

An immune response targeted to host cells is called

Immune system failure

An allergic reaction

Suppressed inflammatory response

An autoimmune disorder

After activation, B cell receptor molecules (BCR) become?

Antibodies

T cell receptors

Complement proteins

Enzymes

Unlock and Upgrade

Remove all limits from your Quizzes

Microbio 310 Exam III

More Quizzes