Lymphe/immune 4

Question 1

In active immunization, the
A. immune system attacks normal body cells.
B. body is deliberately exposed to an antigen.
C. body receives antibodies produced by another
person.
D. body receives antibodies produced by another
animal.
E. genes for antibodies are introduced into the
body.

Answer 1

B. body is deliberately exposed to an antigen.

Question 2

The only antibodies that normally cross
the placenta are
A.	IgA.
B.	IgD.
C.	IgE.
D.	IgG.
E.	IgM.

Answer 2

D. IgG.

Question 3

If the thymus failed to produce the
hormone thymosin, we would expect to
see a decrease in the number of
A.	B lymphocytes.
B.	NK cells.
C.	cytotoxic T cells.
D.	neutrophils.
E.	all of the above

Answer 3

C. cytotoxic T cells.

Question 4

The binding of an antigen to an antibody
can result in
A.	neutralization of the antigen.
B.	agglutination or precipitation.
C.	complement activation and opsonization.
D.	all of the above
E.	A and B only

Answer 4

D. all of the above

Question 5

Areas of the spleen that contain large
numbers of lymphocytes are known as
A.	Peyer’s patches.
B.	adenoids.
C.	white pulp.
D.	red pulp.
E.	lymph nodes.

Answer 5

C. white pulp.

Question 6

The cells responsible for the production of
circulating antibodies are \_\_\_\_\_ cells.
A.	NK
B.	plasma
C.	helper T
D.	cytotoxic T
E.	suppressor T

Answer 6

B. plasma

Question 7

Inappropriate or excessive immune
responses to antigens are
A.	immunodeficiency diseases.
B.	autoimmune diseases.
C.	allergies.
D.	the result of stress.
E.	common in the elderly.

Answer 7

C. allergies.

Question 8

Histamine increases blood flow and vascular
permeability. This would account for all of the
following changes that occur during
inflammation, except
A. redness of the inflamed tissue.
B. increased numbers of phagocytes being attracted to
the tissue.
C. heat of the inflamed tissue.
D. the localization of proteins and cells necessary for
body defense.
E. swelling of the inflamed tissue.

Answer 8

B. increased numbers of phagocytes being attracted

to the tissue.

Question 9

In order for a lymphocyte to respond to an
antigen, the antigen must
A. be phagocytized by the lymphocyte.
B. enter the cytoplasm of the lymphocyte.
C. bind to the DNA of the lymphocyte.
D. bind to specific receptors on the lymphocyte
membrane.
E. depolarize the lymphocyte.

Answer 9

D. bind to specific receptors on the

lymphocyte membrane.

Question 10

Lymphatic organs are different from lymphatic
tissues in that lymphatic organs
A. contain lymphocytes and lymphatic tissues do not.
B. are found in the digestive tract and lymphatic tissues
are found in the thorax.
C. are separated from surrounding tissues by a fibrous
capsule and lymphatic tissues are not.
D. do not produce antibodies, whereas lymphatic tissues
do.
E. both B and C

Answer 10

C. are separated from surrounding tissues by a

fibrous capsule and lymphatic tissues are not.

Question 11

The cells responsible for cellular
immunity are the \_\_\_\_\_ cells.
A.	B
B.	plasma
C.	helper T
D.	cytotoxic T
E.	suppressor T

Answer 11

D. cytotoxic T

Question 12

Stress can affect the immune response in
all of the following ways, except by
A. stabilizing glucocorticoid production.
B. depressing the immune response.
C. reducing the number of phagocytes.
D. inhibiting interleukin secretion.
E. increasing the level of glucocorticoids.

Answer 12

A. stabilizing glucocorticoid production.

Question 13

In an experimental situation, a virus is injected
into a rabbit and the rabbit is allowed to make
antibodies for the viral antigen. These antibodies
are then removed from the rabbit plasma and
injected into a human to help deal with the same
viral disease. This would be an example of
A. innate immunity.
B. active immunization.
C. passive immunization.
D. natural immunity.
E. autoimmunity.

Answer 13

C. passive immunization.

Question 14

The role of accessory cells in immunity is
to
A.	produce antibodies.
B.	produce memory cells.
C.	digest foreign cells and molecules and present
antigens.
D.	actively lyse bacterial cells.
E.	coat pathogens with antigens.

Answer 14

C. digest foreign cells and molecules and

present antigens.

Question 15

The largest collection of lymphatic tissue
in the adult body is located in the
A.	liver.
B.	thymus.
C.	tonsils.
D.	spleen.
E.	lymph nodes.

Answer 15

D. spleen.

Question 16

The human immunodeficiency virus
(HIV) that causes the disease known as
AIDS selectively infects \_\_\_\_\_ cells.
A.	B
B.	plasma
C.	cytotoxic T
D.	helper T
E.	suppressor T

Answer 16

D. helper T

Question 17

The cells responsible for humoral
immunity are the \_\_\_\_\_ cells.
A.	NK
B.	B
C.	helper T
D.	cytotoxic T
E.	suppressor T

Answer 17

B. B

Question 18

Changes in the immune system that
accompany aging include
A.	T cells becoming less responsive to antigens.
B.	more cytotoxic T cells responding to
infections.
C.	increased numbers of T helper cells.
D.	higher levels of antibody after initial exposure
to antigens.
E.	increased number of Langerhans cells.

Answer 18

A. T cells becoming less responsive to antigens.

Question 19

Which of the following is false of human
leukocyte antigens (HLA)?
A. help promote the immune response
B. allow the body to differentiate its own cells
from foreign cells
C. bind antigenic material, when present, for
presentation to lymphocytes
D. can be divided into two major classes
E. are found on all human cells with a nucleus

Answer 19

A. help promote the immune response

Question 20

The “white pulp” of the spleen is
composed of
A.	lymphocytes.
B.	trabeculae.
C.	arteries.
D.	veins.
E.	fibrous connective tissue.

Answer 20

A. lymphocytes.