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9. The lymphatic system consists of _____.
A. lymphatic vessels
B. lymphoid tissues
C. lymphoid organs
D. all of the above
10. The lymphatic system is involved in host defense and reabsorption of large molecules in interstitium.
A. The above statement is true.
B. The above statement is false.
11.
A.
B.
C.
The lymph capillaries are ____.
blind ended vessels
permeable to proteins
both A and B
12. Which of the following statements about lymphatic vessels is true?
A. The lymphatic system is not a circuit but rather a system of vessels with unidirectional flow that carries
lymph fluid to the heart.
B. Lymphatic vessels travel along with blood vessels.
C. Lymph is moved primarily by rhythmic contractions of the lymphatic vessels themselves, but is also aided
by skeletal and respiratory pumps.
D. Valves are present in the larger vessels to prevent backflow.
E. All of the above
13.
A.
B.
C.
Which of the following statements about lymph nodes is NOT correct?
Lymph nodes lie along lymph vessels
Phagocytic macrophages in lymph nodes remove microorganisms and debris as lymph flows through.
Erythrocytes are routinely destroyed in lymph nodes.
14.
A.
B.
C.
D.
E.
Maturation of T lymphocytes occurs in ___ .
kidneys
hypothalamus
lungs
thymus
heart
15.
A.
B.
C.
D.
E.
Nonspecific defenses consist of _______.
physical barriers
chemical barriers
leukocytes and macrophages
all of the above
none of the above
16. Which of the followings is NOT a lymphoid organ?
A. thymus B. lymph nodes
C. spleen D. lymphatic vessels
17 Which of the following is NOT a common feature to both vascular system and
lymphatic vessel system?
A. reabsorption of tissue fluid
B. The fluid in both systems is driven by ventricular
contraction.
C. There are valves to prevent back flow. D. extensive distribution throughout the
body.
18. Cancer cells usually spread into lymphatic vessels before into blood vessels
because___.
A. lymphatic vessels are more extensively distributed than blood vessels
B. lymphatic capillaries are more permeable than blood capillaries
C. cancerous cells face less attacks by lymphocytes in lymphatic system
19. Surgical removal of lymph nodes in the right armpit can cause ____.
A. swelling of the right hand and arm
B. an increased reabsorption of tissue fluid
in the right hand and arm C. no effects on tissue fluid volume
20. After pathogens entered lymphatic vessel system but before into the blood stream,
they ___.
A. face no attack by lymphocytes B. face attacks by lymphocytes in lymphatic vessels
C. face attacks by lymphocytes in lymph nodes
KEY
9D 10A
19A 20C
11C
12E
13C
14D
15D
16D
17B
18B