Deck 19: The Lymphatic System and Lymphoid Organs and Tissues

Question 1

The distal portion of the small intestine contains clumps of lymph follicles called .

A)villi
B)islets of Langerhans
C)Peyer's patches
D)rugae

Answer 1

C

Question 2

Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called an) .

A)appendix
B)Peyer's patch
C)tonsil
D)thymus

Answer 2

C

Question 3

Which lymphatic structure drains lymph from the right upper limb and the right side of the head and thorax?

A)cisterna chyli
B)lumbar trunk
C)right lymphatic duct
D)thoracic duct

Answer 3

C

Question 4

What effect does age have on the size of the thymus?

A)The size of the thymus increases continuously from birth to death.
B)The thymus initially increases in size and then decreases in size from adolescence through old age.
C)The thymus is not affected by age.
D)The size of the thymus decreases continuously from birth to death.

Question 5

Large clusters of lymph nodes occur in all of the following locations except the .

A)axillary region
B)lower extremities
C)cervical region
D)inguinal region

Question 6

The thymus is most active during .

A)childhood
B)old age
C)middle age
D)fetal development

Question 7

Select the correct statement about lymph transport.

A)Under normal conditions,lymph vessels are very high- pressure conduits.
B)Lymph transport depends on the movement of adjacent tissues,such as skeletal muscles.
C)Lymph transport is faster than that occurring in veins.
D)Lymph transport is only necessary when illness causes tissue swelling.

Question 8

The tonsils located at the base of the tongue are the .

A)palatine tonsils
B)pharyngeal tonsils
C)lingual tonsils
D)Peyer's tonsils

Question 9

Which of the following is not a mucosa- associated lymphatic tissue?

A)tonsil
B)appendix
C)Peyer's patch
D)thymus

Question 10

Both lymph and venous blood flow are heavily dependent on .

A)the pumping action of the heart
B)two- way valves
C)skeletal muscle contractions and differences in thoracic pressures due to respiratory movement
D)contraction of the vessels themselves

Question 11

Antibodies that act against a particular foreign substance are released by .

A)T lymphocytes
B)medullary cords
C)plasma cells
D)lymph nodes

Question 12

The thymus is the only lymphoid organ that does not:

A)produce hormones
B)have lymphocytes
C)have a cortex and medulla
D)directly fight antigens

Question 13

Which of the following would not be classified as a lymphatic structure?

A)tonsils
B)pancreas
C)spleen
D)Peyer's patches of the intestine

Question 14

Select the correct statement about lymphocytes.

A)T cells are the only form of lymphocyte found in lymphoid tissue.
B)B cells produce plasma cells,which secrete antibodies into the blood.
C)T cells are the precursors of B cells.
D)The two main types are T cells and macrophages.

Question 15

Which of the following is not a function of the lymphatic system?

A)draining excess interstitial fluid
B)transporting dietary fats
C)transporting respiratory gases
D)carrying out immune responses

Question 16

Which of the following is not a method that maintains lymph flow?

A)skeletal muscle contraction
B)smooth muscle contraction
C)breathing
D)valves in lymph vessel walls

Question 17

Lymph leaves a lymph node via .

A)the cortical sinus
B)the subscapular sinus
C)efferent lymphatic vessels
D)afferent lymphatic vessels

Question 18

Functions of the spleen include all of those below except .

A)removal of old or defective blood cells from the blood
B)forming crypts that trap bacteria
C)storage of iron
D)storage of blood platelets

Question 19

The lymphatic capillaries are .

A)less permeable than blood capillaries
B)more permeable than blood capillaries
C)as permeable as blood capillaries
D)completely impermeable

Question 20

Which of the following is not a normal component of lymph?

A)ions
B)plasma proteins
C)water
D)red blood cells

Question 21

Peyer's patches are found in the .

A)duodenum of the small intestine
B)large intestine
C)jejunum of the small intestine
D)ileum of the small intestine

Question 22

The pulp of the spleen forms cuffs around the central arteries.

Question 23

Which of the following is not a function of lymph nodes?

A)serve as antigen surveillance areas
B)produce lymphoid cells and granular WBCs
C)produce lymph fluid and cerebro- spinal fluid
D)act as lymph filters and activate the immune system

Question 24

Small organs associated with lymphatic vessels are termed .

A)lymph follicles
B)axillary nodes
C)lymph nodes
D)cisterna chyli

Question 25

Explain the term MALT.What is its function?

Question 26

Tonsils have blind- ended structures called .

Question 27

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

Question 28

Describe the mechanisms by which lymphatic fluid is moved through the lymphatics.

Question 29

Select the correct statement about lymphoid tissue.

A)Lymphoid macrophages secrete antibodies into the blood.
B)Lymphoid tissue is predominantly reticular connective tissue.
C)T lymphocytes act by ingesting foreign substances.
D)Once a lymphocyte enters the lymphoid tissue,it resides there permanently.

Question 30

How does the lymphatic system both help and hinder the spread of cancer through the body?

Question 31

Which cells become immunocompetent due to thymic hormones?

A)lymphocytes
B)monocytes
C)basophils
D)macrophages

Question 32

How do the lymph capillaries differ from blood capillaries?

Question 33

What is the special role of the thymus gland?

Question 34

When the lymphatic structures are blocked due to tumors,the result is .

A)abnormally high lymph drainage from the distal region
B)severe localized edema distal to the blockage
C)shrinkage of tissues distal to the blockage due to inadequate delivery of lymph
D)increased pressure in the lymphatics proximal to the blockage

Question 35

What is the consequence of obstruction of the lymphatics?

Question 36

Describe the structural and functional relationship of the vessels of the blood vascular system and the lymphatic system.

Question 37

Lymphatic are formed from the union of the largest collecting vessels.

Question 38

Lymph capillaries are absent in all but which of the following?

A)bones and teeth
B)digestive organs
C)bone marrow
D)CNS

Question 39

The appendix,tonsils,and Peyer's patches are examples of .

Question 40

The are the simplest lymphoid organs and are found at the entrance to the pharynx.

Question 41

Where are the lymph node aggregations most dense?

Question 42

The thoracic duct of the lymphatic system empties into the .

Question 43

How does the structure of a lymph node allow lymphocytes and macrophages to perform their protective function?

Question 44

List the functions of the spleen.

Question 45

Hassall's corpuscles are always found in the lighter- colored _ regions of the thymus.

Question 46

Highly specialized lymph capillaries called are present in the villi of the intestinal mucosa.

Question 47

Characterize lymph transport in terms of rate,volume,and ability to change.

Question 48

Name the tonsils and state their body locations.