Chapter 20 The Lymphatic System and Lymphoid Organs and Tissues

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Chapter 20 The Lymphatic System and Lymphoid Organs and Tissues
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True/False Questions
1) Peyer's patches are clusters of lymphoid tissue found primarily in the large intestine.

FALSE

2

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

TRUE

3

3) Lymph always flows away from the heart.

FALSE

4

4) Lymphatic capillaries are permeable to proteins.

TRUE

5

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

TRUE

6

6) Chyle is delivered to the blood via the lymphatic system.

TRUE

7

7) All lymphoid organs develop from mesoderm.

FALSE

8

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

TRUE

9

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

TRUE

10

10) Lymphoid tissue is mainly reticular connective tissue.

TRUE

11

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

TRUE

12

12) All the lymphoid organs are well developed before birth.

FALSE

13

13) An infected lymph gland is called a bubo.

TRUE

14

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

TRUE

15

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

FALSE

16

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

TRUE

17

17) All lymphatic organs are composed of epithelial tissue.

FALSE

18

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

FALSE

19

19) The simplest lymphoid organs are the lymph nodes.

FALSE

20

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