Practice Quiz 16

Which of the following is considered part of the body's specific lines of defense against

disease?

A) protective cells

B) intact skin

C) antibodies
D) mucous membranes

E) blood-borne chemicals

C) antibodies

Which of the following is NOT a characteristic of B cells?

A) They are responsible for antibody formation.
B) They recognize antigens associated with MHC I.

C) They have antibodies on their surfaces.

D) They originate in bone marrow.
E) They can produce a memory response.

B) They recognize antigens associated with MHC I.

Which of the following destroys virus-infected cells?
A) B cell

B) macrophage

C) TH

D) TCyt

E) Tregulatory

D) TCyt

Chemical signals sent between leukocytes are

A) Epitopes.

B) Antigens.
C) Complement.

D) Interferons.

E) Interleukins.

D) Interferons.

Cell death by apoptosis is caused by

A) TH1 cells.

B) B cells.
C) Tregulatory cells.
D) Cytotoxic T lymphocytes.

E) TH2 cells.

D) Cytotoxic T lymphocytes (Tcyt)

TRUE OR FALSE:

Cytotoxic T lymphocytes are responsible for the humoral immune responses.

False

(Tcyt = MHC-I, endogenous, intracellular, cell mediated)

TRUE OR FALSE:

Cytokines are soluble regulatory proteins that act as intercellular signals and include substances such as interleukins and interferons.

True

TRUE OR FALSE:

If a virus were to destroy helper T cells, the body would be unable to stimulate the cell- mediated immune response but would still be able to activate the humoral response.

False

The body recognizes antigens by the three-dimensional shapes of regions known as

___________________________.

Epitopes (antigenic determinants)

An antigen produced by a pathogen while living inside a cell is known as a/an __________ antigen.

Endogenous

Class II MHC is found on the surface of B lymphocytes and __________ cells.

antigen presenting

During the humoral response, type ____ helper cells are used to activate ____ lymphocytes to replicate, create memory cells, and make ________________.

type 2, B, antibodies