Deck 23: Lymphatic System

Question 1

Activities that result in central movement,or flow,of lymph are called lymphokinetic actions.

Answer 1

True

Question 2

Chyle is milky lymph that is high in fat content.

Answer 2

True

Question 3

Lymph contains platelets,which allow clots to form in lymphatic vessels.

Answer 3

False

Question 4

The lymphatic system is actually a specialized component of the circulatory system,because it consists of a moving fluid derived from the blood and tissue fluid and a group of vessels that return the fluid to the blood.

Question 5

Protein substances that have left the bloodstream return by way of lymph fluid.

Question 6

Lymphatic vessels originate as microscopic,blind-end vessels called lymphatic capillaries.

Question 7

The lymphatic system,like the circulatory system,is a closed circuit.

Question 8

Damage to main lymphatic ducts may cause death from the loss of serum proteins.

Question 9

Veins have more valves than do lymphatics.

Question 10

Lymphatic capillaries (called lacteals)in the small intestine are important in the absorption of fats.

Question 11

The two most important functions of the lymphatic system are the maintenance of fluid balance in the internal environment and immunity.

Question 12

Both lymph and interstitial fluid contain a higher percentage of proteins than does plasma.

Question 13

Lymphatic capillaries and blood capillaries both play important roles in the absorption of proteins from tissue spaces.

Question 14

Lymphatic vessels contain more valves than do veins.

Question 15

Lymph is derived from blood and tissue fluid.

Question 16

The cisterna chyli drains into the right lymphatic duct.

Question 17

Besides fluid balance and immunity,the lymphatic system plays an important role in the absorption of lipids.

Question 18

Lymph from the entire body drains eventually into the thoracic duct.

Question 19

About 1.5 liters of lymph flows through the thoracic duct daily.

Question 20

Lymphatics have thicker walls than do veins.

Question 21

Germinal centers are areas of rapidly dividing lymphocytes within a cortical node.

Question 22

The breast-the mammary gland and the surrounding tissues-is drained by six sets of lymphatic vessels.

Question 23

The majority of lymph from the breast enters the axillary lymph nodes.

Question 24

The supratrochlear lymph nodes are located in the neck along the sternocleidomastoid muscle.

Question 25

Even though some lymph nodes occur in clusters,most occur as single nodes.

Question 26

Lymph nodes contain reticuloendothelial cells that produce certain red blood cells.

Question 27

The palatine tonsils are located on each side of the throat.

Question 28

Axillary node enlargement may be a sign that breast cancer cells have spread to the nodes.

Question 29

Lymphatic vessels run parallel to veins and form frequent anastomoses with them.

Question 30

The inguinal lymph nodes are located in the groin.

Question 31

Lymph nodes,or glands,are perfectly round structures.

Question 32

The fetal thymus forms immature lymphocytes,which then move to the bone marrow for the final stages of lymphocyte development before birth.

Question 33

The lymphatic tissue of lymph nodes serves as the site of the final stages of maturation for some types of lymphocytes and monocytes that have migrated from the bone marrow.

Question 34

Lymph nodes may range from 1 mm to more than 20 mm in diameter.

Question 35

The cutaneous lymphatic plexus drains lymph from the breast.

Question 36

The valves in the lymphatics are more numerous in the larger vessels.

Question 37

The thymus appears yellowish early in childhood because of the high concentration of fat.

Question 38

The passive compression of the body's soft tissues may act as a lymphokinetic factor.

Question 39

Cancer of the breast is one of the most common forms of malignancy in women.

Question 40

When an infection is present,germinal centers form and the lymph node begins to release lymphocytes; some become antibody-producing plasma cells.

Question 41

Lymph does not have the ability to clot.

Question 42

More than 85% of the lymph from the breast enters lymph nodes at the lateral edge of the sternum.

Question 43

The hilus is a small depression on a lymph node from which the efferent lymph vessel exists.

Question 44

Patients with immunodeficiencies such as AIDS often develop a malignancy of lymphoid tissue.

Question 45

After puberty,the thymus decreases in size; this process is called involution.

Question 46

Anastomoses are not characteristic of lymphatic vessels,and therefore a malignant tumor in one breast cannot spread to the other breast.

Question 47

Lymphedema,a swelling of the tissues of the extremities,may be treated by diuretics,bed rest,and elevation of the involved extremities.

Question 48

The size of the spleen is relatively constant in different individuals,regardless of sex or age.

Question 49

Activities that result in the flow of lymph are breathing movements and skeletal muscle contractions.

Question 50

Peyer patches make up the structural framework of both the spleen and tonsils.

Question 51

Lymphatic capillaries that operate in the villi of the small intestine are called lacteals.

Question 52

Thymosin enables lymphocytes to develop into mature T cells,which attack foreign or abnormal cells.

Question 53

Removal of the spleen will most likely render a patient ill for the rest of his or her life.

Question 54

Hodgkin and non-Hodgkin are categories of lymphangitis.

Question 55

The spleen removes imperfect platelets from the blood.

Question 56

The milky lymph found in lacteals after digestion is called chyle.

Question 57

The lymphatic system contributes to the circulatory system.

Question 58

The spleen is not classified as a vital organ.

Question 59

The thymus plays an important role in "seeding" other lymphatic tissue such as the spleen and lymph nodes with lymphocytes.

Question 60

Even though some lymph nodes occur as single nodes,most occur in clusters.

Question 61

There are between 10 to 15 axillary lymph nodes.

Question 62

The spleen's two functions are defense of foreign microorganisms and provision of a blood reservoir.

Question 63

Blood in veins and lymph in lymph vessels are moved by the same kinds of "pumps."

Question 64

The "beaded" appearance of lymph vessels is caused by bands of smooth muscle tissue surrounding the vessel.

Question 65

A large amount of interstitial fluid that collects in the tissue and causes swelling is called edema.

Question 66

Peyer patches are isolated nodules of lymphatic tissue in the intestinal wall.

Question 67

The reason the red pulp of the spleen is red is that it contains a great deal of blood.

Question 68

The cisterna chyli is in the thoracic cavity just inferior to the left subclavian vein.

Question 69

About half the lymph that passes through the thoracic duct comes from the liver and the small intestine.

Question 70

Interstitial fluid fills the spaces between the cells.

Question 71

The lymphatic system returns about 3 liters of lymph back to the blood each day by consistently returning about 125 ml per hour.

Question 72

The thymus gland is a primary organ of the lymphatic system with an epithelial framework structure similar to that of the spleen.

Question 73

Almost all of the interstitial fluid filtered out by the capillaries enters the lymphatic system.

Question 74

The tunica media of lymph vessels is similar to that of veins except the lymph vessels have no smooth muscle.

Question 75

One function of the lymph node is to slow down the flow of lymph so that microorganisms and particulate matter can be phagocytized.

Question 76

The highest concentration of protein in the lymphatic system is found in the cisterna chyli.

Question 77

The semilunar valves of the lymph vessels are formed from folds of the tunica intima.

Question 78

The high degree of permeability of lymphatic capillaries allows particulate matter to enter the capillary.

Question 79

When interstitial fluid enters a lymph vessel,it is called lymph.

Question 80

Even though the lymphatic system has no single muscular pump like the heart,lymph flows at about the same speed as blood.