A&P 2 CH. 20

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1

Protein-containing fluid within lymphatic vessels.

Lymph

2

Stores blood platelets.

spleen

3

Receives lymph from most of the body.

Thoracic duct

4

Small organs intimately associated with lymphatic vessels.

Lymph nodes

5

Largest lymphatic organ.

spleen

6

Isolated clusters of lymph follicles found in the wall of the small intestine.

Peyer's patches

7

Peyer's patches are clusters of lymphoid tissue found primarily in the large intestine.

False

8

The lymphatic capillaries function to absorb the excess protein-containing interstitial fluid and return it to the bloodstream.

True

9

Lymph capillary permeability is due to minivalves and protein filaments.

True

10

Lymphatic capillaries are permeable to proteins.

True

11

Digested fats are absorbed from the intestine by the lymph capillaries.

True

12

Chyle is delivered to the blood via the lymphatic system.

True

13

There are more efferent lymphatic vessels leaving a lymph node than there are afferent vessels entering a lymph node.

False

14

About 3 liters of fluid are lost to the tissue spaces every 24 hours and are returned to the bloodstream as lymph.

True

15

Because lymph vessels are very low-pressure conduits, movements of adjacent tissues are important in propelling lymph through the lymphatics.

True

16

Lymphoid tissue is mainly reticular connective tissue.

True

17

Lymphocytes reside temporarily in lymphoid tissue, then move to other parts of the body.

True

18

All the lymphoid organs are well developed before birth.

False

19

Like blood, lymph flows both to and from the heart.

True

20

When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of large particles such as cell debris, pathogens, and cancer cells.

True

21

The cisterna chyli collects lymph from the lumbar trunks draining the upper limbs and from the intestinal trunk draining the digestive organs.

False

22

If even a small part of the spleen is left in a ten-year-old child, it will most likely regenerate itself.

True

23

In the spleen, red pulp is involved in the immune functions and white pulp is involved in disposing of worn-out RBCs.

False

24

The most important role of the spleen is to provide a site for lymphocyte proliferation and immune surveillance and response.

False

25

The simplest lymphoid organs are the lymph nodes.

False

26

Small organs associated with lymphatic vessels are termed ________.

lymph nodes

27

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

pancreas

28

Which of the following statements regarding the thymus is not true?

It has follicles similar to those in the spleen

29

Lymph transport involves all but which of the following?

smooth muscle contraction in the lymph capillary walls

30

The thymus is most active during ________.

childhood

31

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

right lymphatic duct

32

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

erythrocytes

33

The lymphatic capillaries are ________.

more permeable than blood capillaries

34

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

plasma cells

35

Lymph leaves a lymph node via ________.

efferent lymphatic vessels

36

Which cells become immunocompetent due to thymic hormones?

lymphocytes

37

Functions of the spleen include all of those below except ________.

forming crypts that trap bacteria

38

When the lymphatic structures of a limb are blocked due to tumors, the result is ________.

severe localized edema distal to the blockage of that limb

39

Select the correct statement about lymph transport.

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

40

Select the correct statement about lymphocytes.

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

41

Select the correct statement about lymphoid tissue.

Lymphoid tissue is predominantly reticular connective tissue.

42

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

tonsil

43

53) Which of the following does not contain a mucosa-associated lymphatic tissue?

thymus

44

Peyer's patches are found in the ________.

ileum of the small intestine

45

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

digestive organs

46

What is a bubo?

an infected lymph node

47

The thymus is the only lymphoid organ that does not ________.

directly fight antigens

48

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

lower extremities

49

Digestive tract-associated lymphatic tissue includes all of the following except ________.

islets of Langerhans

50

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

capillary smooth muscle contraction

51

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

lingual tonsils

52

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

red blood cells

53

A sentinel node is ________.

the first node to receive lymph from an area suspected to be cancerous

54

Which of the following are functions of lymphoid tissue?

house and provide a proliferation site for lymphocytes and furnish an ideal surveillance vantage point for lymphocytes and macrophages

55

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

transporting respiratory gases

56

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

produce lymph fluid and cerebrospinal fluid

57

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

tonsils

58

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

MALT

59

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

lacteals

60

Splenic ________ pulp is primarily concerned with immune functions of the spleen.

white

61

Tonsils have blind-ended structures called ________.

crypts

62

Thymic corpuscles are always found in the lighter-colored ________ regions of the thymus.

medullary

63

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

white

64

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

trunks

65

What is the consequence of obstruction of the lymphatics?

edema distal in the body to the obstruction

66

Where are the lymph node aggregations most dense?

near the body surface in the inguinal, axillary, and cervical regions of the body.

67

What is the special role of the thymus gland?

By secreting hormones, the thymus gland causes T lymphocytes to become immunocompetent

68

List the functions of the spleen.

remove aged or defective blood cells and platelets from the blood and to store or release some of the breakdown products of RBCs to the blood for processing by the liver

69

How is the skeletal system tied to the lymphatic system?

The lymphatic system removes excess fluids in the periostea. The lymphocytes protect the bones from pathogens. Parts of the skeletal system produce the lymphocytes found in the lymphatic system.