Transcript Chapter 20 - next2eden.net

Active Lecture Questions
CHAPTER
20
The
Lymphatic
System and
Lymphoid
Organs and
Tissues
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Lymphatic vessels:
a. collect excess fluid from interstitial spaces.
b. drain blood from lymph nodes.
c. are part of the venous system.
d. are built like arteries.
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Lymphatic capillaries owe their permeability
to the presence of:
a. an open end that siphons fluid from the
interstitial fluid.
b. minivalves in their walls.
c. tight junctions between adjacent cells.
d. proteins in the lymph fluid.
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Why would removal of lymph vessels from
the right axillary region cause edema in the
right arm?
a. Excess blood plasma builds up in regions
where there are no lymph vessels.
b. Surgery always results in tissue swelling.
c. Blood is inefficiently circulated in areas
where surgery has occurred.
d. Both b and c are true.
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Which of the following represents a logical
sequence of structures that contribute to
the return of fluid into the blood via the
lymphatic system?
a. Blood capillaries, arteries, lymphatic
vessels, subclavian vein
b. Arteries, lymphatic vessels, blood
capillaries, subclavian vein
c. Arteries, blood capillaries, lymphatic
vessels, subclavian vein
d. Subclavian vein, arteries, blood capillaries,
lymphatic vessels
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Which of the following contribute(s) to the
flow of lymph through lymphatic vessels?
a. The pumping of the heart
b. The milking action of skeletal muscle
contraction
c. Pressure changes in the thorax that result
from breathing
d. Both b and c
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Which of the following would the body
perceive as an antigen?
a. Bacteria
b. Virus
c. Mismatched red blood cell
d. All of the above
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An advantage to having reticular connective
tissue present in lymph nodes would be
that:
a. the loose organization of reticular
connective tissue provides niches for
macrophages and lymphocytes.
b. lymph filters through the nodes and is
exposed to lymphocytes and
macrophages.
c. lymphocytes cycle to various areas of the
body and back to lymph nodes.
d. all of the above take place.
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The highest density of lymph nodes can be
found ________.
a. in the arms and legs
b. in the brain
c. at the locations where lymphatic collecting
vessels converge
d. in the intestines
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Lymph tends to stall inside lymph nodes.
This is due to:
a. small-diameter spaces within the medulla.
b. the large volume of lymph entering the
node.
c. fewer efferent lymphatic vessels than
afferent lymphatic vessels.
d. fewer afferent lymphatic vessels than
efferent lymphatic vessels.
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_________ can enter lymph capillaries.
a. Bacteria
b. Large proteins
c. Interstitial fluid
d. All of the above
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The ______ is the largest lymphoid organ.
a. lymph node
b. spleen
c. thymus
d. tonsil
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Red pulp of the spleen is most concerned
with _______, while white pulp is most
concerned with _________.
a. immunity; new red blood cell formation
b. filtering lymph; T lymphocyte formation
c. blood filtering; immunity
d. urine formation; blood filtering
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Which of the following lymphoid tissues
removes defective red blood cells from the
blood?
a. Lymph node
b. Thymus
c. Spleen
d. Peyer’s patches
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The thymus is important for:
a. T lymphocyte maturation.
b. removal of foreign antigens.
c. B lymphocyte maturation.
d. secretion of hormones that promote B
lymphocyte immunocompetence.
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Tonsils promote memory of pathogens by:
a. secreting antibodies into the blood.
b. trapping food particles to support bacterial
growth.
c. trapping pathogens to develop immune
cells with memory.
d. producing B lymphocytes.
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