Chapter 21 test

Question 1

The only lymphatic Organ with both afferent and efferent lymphatic vessels is 
A. the spleen
B. a lymph node
C. a tonsil
D. a Peyer patch
E. the thymus

Answer 1

b. lymph node

Question 2

Which of the following cells are involved in nonspecific resistance but not in specific defense?
A. helper T cells
B. cytotoxic T cells
C. natural killer cells
D. B cells
E. plasma cells

Answer 2

C. natural killer cells

Question 3

The respiratory burst is used by \_\_\_\_\_\_ to kill bacteria.
A. neutrophils  
B. basophils
C. mast cells
D. NK cells 
E. cytotoxic T cells

Answer 3

A. Neutrophil

Question 4

Which of these is a macrophage?
A. a microglial cell
B. a plasma cell
C. a reticular cell
D. a helper T cell
E. a mast cell

Answer 4

a. A microglial cell

Question 5

The cytolytic action of the complement system is most similar to the action of 
A. interleukin-1
B. platelet-derived growth factor
C. granzymes
D. perforin
E. IgE

Answer 5

d. perforin

Question 6

\_\_\_\_\_\_\_\_ become antigenic by binding to larger host molecules.
A. epitopes
B. haptens
C. interleukins
D. pyrogens
E. call-adhesion molecules

Answer 6

b. haptens

Question 7

Which of the following correctly states the order of events in humoral immunity? let 1= antigen display, 2= antibody secretion, 3= secretion of interleukin, 4= clonal selection, and 5= endocytosis of an antigen.
A. 3-4-1-5-2
B. 5-3-1-2-4
C.3-5-1-4-2
D. 5-3-1-4-2
E. 5-1-3-4-2

Answer 7

e. E. 5-1-3-4-2

Question 8

The cardinal signs of inflammation include all of the following except
A. redness
B. swelling
C. heat
D. fever
E. pain

Answer 8

d. fever

Question 9

A helper T cell can bind only to another cell that has
A. MHC-II proteins
B. an epitope
C. an antigen-binding site
D. a complement-binding site
E. a CD4 protein

Answer 9

A. MHC-II proteins

Question 10

Which of the following results from a lack of self-tolerance?
A. SCID
B. AIDS
C. systemic lupus erythematosus
D. anaphylaxis
E. asthma

Answer 10

C. systemic lupus erythematosus

Question 11

Any organism or substance capable of causing disease is called a/an ________.

Answer 11

Pathogen

Question 12

Mucous membranes contain an antibacterial enzyme called _______.

Answer 12

Lysozyme

Question 13

_______ is a condition in which one or more lymph nodes are swollen and painful to the touch.

Answer 13

Lymphadenitis

Question 14

The movement of leukocytes through a capillary or venule wall is called _______.

Answer 14

Diapedesis (emigration)

Question 15

In the process of ______, complement proteins coat bacteria and serve as binding sites for phagocytes.

Answer 15

opsonization

Question 16

any substance that triggers a fever is called a/an ______.

Answer 16

Pyrogen

Question 17

The chemical signals produced by leukocytes to stimulate other leukocytes are called _____.

Answer 17

Interleukins

Question 18

Part of an antibody called the ______ binds to part of an antigen called the ______.

Answer 18

antigen-binding site, epitope

Question 19

Self- tolerance results from a process called _____, in which lymphocytes programmed to react against self-antigens die.

Answer 19

Clonal deletion

Question 20

Any disease in which antibodies attack one’s own tissues is called a/an _______ disease.

Answer 20

autoimmune

Question 21

Some bacteria employ lysozyme to liquefy the tissue gel and make it easier for them to get around. T or F.

Answer 21

False=

Lysozyme is a bacteria-killing enzyme.

Question 22

T lymphocytes undergo clonal deletion and anergy in the thymus. T or F.

Answer 22

True

Question 23

Interferons help to reduce inflammation. T or F.

Answer 23

False=

Interferons promote inflammation.

Question 24

T lymphocytes are involved only in cell-meditated immunity. T or F.

Answer 24

False=

Helper T cells are also necessary to humoral immunity.

Question 25

The white pulp of the spleen gets its color mainly from lymphocytes and macrophages. T or F.

Answer 25

True

Question 26

Perforins are employed in both nonspecific resistance and cellular immunity. T or F.

Answer 26

True

Question 27

Histamine and heparin are secreted by basophils and mast cells. T or F.

Answer 27

True

Question 28

A person who is HIV-positive and have a CD4 count of 1000 cells/uL does not have AIDs. T or F.

Answer 28

True

Question 29

Anergy is often a cause of autoimmune diseases. T or F.

Answer 29

False=

angery is a loss of lymphocyte activity, where as autoimmune diseases result from misdirected activity.

Question 30

Interferons kill pathogenic bacteria by making holes in their cell walls. T or F.

Answer 30

False=

Interferons inhibit viral replication; perforins lyse bacteria