Lymph/immune 2

Question 1

Nonspecific defenses include
A.	those present at birth.
B.	physical barriers.
C.	inflammation.
D.	interferons.
E.	all of the above

Answer 1

E. all of the above

Question 2

The cell that dominates in the deep
cortical region of a lymph node is the
\_\_\_\_\_ cell.
A.	B
B.	T
C.	plasma
D.	nodule
E.	NK

Answer 2

B. T

Question 3

The thoracic duct drains lymph from all of
the following regions, except the
A.	left side of the head.
B.	upper lobe of the right lung.
C.	left arm and shoulder.
D.	body regions below the diaphragm.
E.	left side of the thorax.

Answer 3

B. upper lobe of the right lung.

Question 4

All of the various macrophages are
derived from
A.	lymphocytes.
B.	monocytes.
C.	neutrophils.
D.	eosinophils.
E.	basophils.

Answer 4

B. monocytes.

Question 5

During a primary humoral response to antigens
all of the following occur, except
A. B cells may differentiate into plasma cells
immediately.
B. B cells may undergo several rounds of mitosis before
producing plasma cells and memory cells.
C. antibody levels do not peak until 1 to 2 weeks after
the initial exposure.
D. neutrophils invade the surrounding areas, releasing
chemotactic substances.
E. the first immunoglobulins to appear in circulation are
of the IgM type.

Answer 5

D. neutrophils invade the surrounding areas,

releasing chemotactic substances.

Question 6

Specific defenses depend on the activities
of
A.	monocytes.
B.	leukocytes.
C.	agranulocytes.
D.	erythrocytes.
E.	lymphocytes.

Answer 6

E. lymphocytes.

Question 7

Examples of physical barriers that you
have against pathogens include
A.	sebaceous glands.
B.	hair.
C.	epithelium.
D.	epidermal surface of the skin.
E.	all of the above

Answer 7

E. all of the above

Question 8

Lymph nodes do all of the following,
except that they
A. produce antibodies.
B. monitor the contents of lymph.
C. remove debris and pathogens from the lymph.
D. act as a “way station” for cancer cells.
E. remove excess nutrients from the lymph.

Answer 8

E. remove excess nutrients from the lymph.

Question 9

The effects of activating the complement
system include all of the following, except
A.	destruction of target cell membranes.
B.	stimulation of inflammation.
C.	deactivation of the immune response.
D.	opsonization.
E.	chemotaxis.

Answer 9

C. deactivation of the immune response.

Question 10

The various classes of immunoglobulins
are differentiated on the basis of their
A.	shapes.
B.	affinity for antigens.
C.	variable regions.
D.	fixed segments.
E.	both B and C

Answer 10

D. fixed segments.

Question 11

All of the following are true of the secondary or
anamnestic response of humoral immunity,
except that it
A. involves memory B cells.
B. results in elevated titers of antibodies sooner than in
the primary response.
C. generally prevents a person from showing symptoms
of the disease.
D. can occur even if the second exposure occurs years
after the initial exposure.
E. promotes an increased susceptibility to immune
system failure.

Answer 11

E. promotes an increased susceptibility to immune

system failure.

Question 12

Inflammation produces localized
A.	swelling.
B.	redness.
C.	heat.
D.	pain.
E.	all of the above

Answer 12

E. all of the above

Question 13

All of the following are true of the thymus
gland, except that it
A. activates B cells.
B. reaches its greatest size relative to body size
during the first to second year of life.
C. undergoes involution after puberty.
D. produces T cells.
E. lies behind the sternum in the anterior
mediastinum.

Answer 13

A. activates B cells.

Question 14

The classic pathway of complement
fixation occurs when C1 binds to
A.	the cell wall of bacteria.
B.	the cell membrane of bacteria.
C.	an antibody attached to an antigen.
D.	a cell surface antigen.
E.	a plasma protein.

Answer 14

C. an antibody attached to an antigen.

Question 15

Immunoglobulins that are single molecules and
are mainly responsible for resistance against
viruses, bacteria, and bacterial toxins are
A. IgA.
B. IgD.
C. IgE.
D. IgG.
E. IgM.

Answer 15

D. IgG.

Question 16

In general, lymphocytes
A.	spend little time in the blood.
B.	have relatively long life spans.
C.	are evenly distributed in the lymphatic tissues.
D.	all of the above
E.	A and B only

Answer 16

E. A and B only

Question 17

Fever can be described as the maintenance
of body temperature greater than
A.	37.2C.
B.	99F.
C.	98.6F.
D.	both A and C
E.	both A and B

Answer 17

E. both A and B

Question 18

Acquired immunity is to \_\_\_\_\_ as active
immunity is to \_\_\_\_\_.
A.	active or passive; exposure
B.	genetics; exposure
C.	birth; genetics
D.	both A and C
E.	none of the above

Answer 18

A. active or passive; exposure

Question 19

The following is a list of the stages that occur during
a bacterial infection.
1. Cytotoxic T cells appear.
2. Inflammation, lymphokines, and monokines attract
phagocytes.
3. Neutrophils and NK cells migrate into the infected area.
4. B cells differentiate and the number of plasma cells
increases.
5. A gradual, sustained increase in antibodies occurs.
The proper sequence for these steps is
A. 2, 3, 1, 4, 5.
B. 1, 3, 2, 4, 5.
C. 4, 5, 2, 1, 3.
D. 3, 2, 1, 4, 5.
E. 3, 1, 2, 4, 5.

Answer 19

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Question 20

The following are steps in the cell-mediated immune
response.
1. Several cycles of mitosis occur.
2. Antigen is engulfed and presented by a macrophage.
3. Cytotoxic T cells migrate to focus of infection.
4. Undifferentiated T cells with specific receptors recognize
the antigen.
5. T cells differentiate into cytotoxic T cells and T memory
cells.
6. Cytotoxic T cells release perforin and/or lymphotoxin.
The correct sequence for these steps is
A. 4, 1, 5, 3, 6, 2.
B. 2, 4, 1, 5, 3, 6.
C. 1, 2, 4, 5, 3, 6.
D. 3, 2, 4, 1, 5, 6.
E. 3, 6, 4, 5, 1, 2.

Answer 20

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