Chapter 21: Lymphatic System

Question 1

Small organs associated with lymphatic vessels are termed ____.
a. lacteals
b. lymph follicles
c. lymphatics
d. lymph nodes

Answer 1

Lymph nodes

Question 2

Which of the following would not be classified as a lymphatic structure?
a. spleen
b. pancreas
c. tonsils
d. Peyer’s patches of the intestine

Answer 2

Pancreas

Question 3

Most immune responses originate in ____.
a. primary lymphoid structures
b. secondary lymphoid structures
c. the skin
d. the liver

Answer 3

Secondary lymphoid structures

Question 4

Which cells become immunocompetent due to thymic hormones?
a. macrophages
b. monocytes
c. lymphocytes
d. basophils

Answer 4

Lymphocytes

Question 5

Which of the following is not a part of the lymphatic system?
a. erythrocytes
b. lymphatic vessels
c. lymph
d. lymph nodes

Answer 5

Erythrocytes

Question 6

Functions of the spleen include all of those below except
a. forming crypts that trap bacteria
b. storage of blood platelets
c. storage of iron
d. removal of old or defective blood cells from the blood.

Answer 6

Forming crypts that trap bacteria.

Question 7

The lymphatic capillaries are ____.
a. more permeable than blood capillaries
b. completely impermeable
c. less permeable than blood capillaries
d. as permeable as blood capillaries

Answer 7

More permeable than blood capillaries.

Question 8

Antibodies that act against a particular foreign substance are released by ____.
a. plasma cells
b. lymph nodes
c. T lymphocytes
d. medullary cords

Answer 8

Plasma cells

Question 9

Lymph leaves a lymph node via ____.
a. afferent lymphatic vessels
b. efferent lymphatic vessels
c. the subcapsular sinus
d. the cortical sinus

Answer 9

Efferent lymphatic vessels

Question 10

Select the correct statement about lymphocytes.
a. B cells produce plasma cells, which secrete antibodies into the blood.
b. T cells are the only form of lymphocyte found in lymphoid tissue.
c. T cells are the precursors of B cells.
d. The two main types are T cells and macrophages.

Answer 10

B cells produce plasma cells, which secrete antibodies into the blood.

Question 11

The thymus is the only lymphoid organ that does
not ________.
a. directly fight antigens
b. have a cortex and medulla
c. produce hormones
d. have lymphocytes

Answer 11

Directly fight antigens

Question 12

Which of the following statements regarding the thymus is not true?
a. It functions strictly in T lymphocyte maturation.
b. Its stroma consists of epithelial tissue.
c. It does not fight antigens.
d. It has follicles similar to those in the spleen.

Answer 12

It has follicles similar to those in the spleen.

Question 13

Lymph capillaries are absent in all except which of the following?
a. bone marrow
b. digestive organs
c. bones and teeth
d. CNS

Answer 13

Digestive organs

Question 14

Lymph transport involves all but which of the following?
a. lymph capillary minivalve action
b. smooth muscle contraction in the lymph capillary walls
c. thorax pressure changes during breathing
d. milking action of active muscle fibers

Answer 14

Smooth muscle contraction in the lymph capillary walls

Question 15

Digestive tract-associated lymphatic tissue includes all of the following
except ________.
a. islets of Langerhans
b. palatine tonsils
c. lingual tonsils
d. Peyer’s patches

Answer 15

Islet of Langerhans

Question 16

The tonsils located at the base of the tongue are the ________.
a. pharyngeal tonsils
b. lingual tonsils
c. palatine tonsils
d. Peyer’s tonsils

Answer 16

Lingual tonsils

Question 17

Select the correct statement about lymph transport.
a. Lymph transport is only necessary when illness causes tissue swelling.
b. Under normal conditions, lymph vessels are very high-pressure conduits.
c. Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles.
d. Lymph transport is faster than that occurring in veins.

Answer 17

Lymph transport depends on the movements of adjacent tissues, such as skeletal muscles.

Question 18

Which of the following are functions of lymphoid tissue?
a. house and provide a proliferation site for lymphocytes
b. house and provide a proliferation site for neutrophils
c. furnish an ideal surveillance vantage point for lymphocytes and macrophages
d. A and C

Answer 18

A and C

Question 19

Which of the following is
not a normal component of lymph?
a. red blood cells
b. water
c. ions
d. plasma proteins

Answer 19

Red blood cells

Question 20

Which of the following is not a function of lymph nodes?
a. act as lymph filters and activate the immune system
b. produce lymph fluid and cerebrospinal fluid
c. serve as antigen surveillance areas
d. produce lymphoid cells and house granular WBCs

Answer 20

Produce lymph fluid and cerebrospinal fluid.

Question 21

Which of the following is
not a function of the lymphatic system?
a. transporting respiratory gases
b. transporting dietary fats
c. draining excess interstitial fluid
d. carrying out immune responses

Answer 21

Transporting respiratory gases.

Question 22

Large clusters of lymph nodes occur in all of the following locations
except the ________.
a. lower extremities
b. cervical region
c. inguinal region
d. axillary region

Answer 22

Lower extremities

Question 23

Which lymphatic structure drains lymph from the right upper limb and the right side of the head and thorax?
a. thoracic duct
b. right lymphatic duct
c. cisterna chyli
d. lumbar trunk

Answer 23

Right lymphatic duct

Question 24

Which of the following is associated with passive immunity?
a. exposure to an antigen
b. passage of IgG antibodies from a pregnant mother to her fetus
c. infusion of weakened viruses
d. booster shot of vaccine

Answer 24

Passage of IgG antibodies from a pregnant mother to her fetus.

Question 25

Which of the following is not a type of T cell?
a. helper
b. cytotoxic
c. regulatory
d. antigenic

Answer 25

Antigenic