chapter 31 part 2

1.

1 point

Michael, a 43-year-old man, was in a serious car accident. He has a rigid and tender left hypochondrium region. His blood pressure is dropping, and he is in pain. What organ might be involved in this injury?

liver

spleen

kidney

pancreas

2.

1 point

How are lymphatic capillaries related to the function of the lymphatic system?

The wall of the lymphatic capillary consists of a multiple layer of flattened endothelial cells that prevents drainage of blood into the lymphatic system.

The high degree of permeability of the lymphatic capillary wall permits very large molecules and even particulate matter, which cannot be absorbed into the blood capillary, to be removed from the interstitial space.

The lymphatic capillary network allows lymph to flow from the larger-walled capillaries into the vessels with a thin wall diameter.

The thoracic duct is approximately the same size as the large veins and forms an open circuit to drain fluid into the renal system.

3.

1 point

Which best describes the mechanism involved with central movement, or flow, of lymph?

lymph flow is caused by relaxation of the skeletal muscles.

lymph flow is caused by the contraction of blood vessels

Movement is caused by gravity.

Lymph flow in the body is the result of contracting skeletal muscles.

4.

1 point

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

thymus

thyroid

spleen

Never patches

5.

1 point

What structure drains lymph from about 3/4 of the body into subclavian vein?

spleen

cisterna chyli

right lymphatic duct

thoracic duct

6.

1 point

Which would you predict would occur if a disease blocked the flow of lymph?

The liver might become enlarged or lymphedema may occur

hematopoiesis would not occur

the affected extremity would begin to shrink and become useless

lymphokinesis would increase

7.

1 point

How do the reticuloendothelial cells compare to white blood cells as a defense against infection?

There is no comparison between these two types of cells; reticuloendothelial cells are in the lymphatic system and the white blood cells are part of the circulatory system.

Reticuloendothelial cells (macrophages) lining the spleen remove microorganisms from the blood and destroy them by phagocytosis in a fashion similar to that of white blood cells.

Reticuloendothelial cells (macrophages) lining the spleen prevent microorganisms from entering the blood in a similar fashion as do white blood cells, thus preventing infection.

Only white blood cells play a role in the body’s defense against infection.

8.

1 point

About half of the lymph flowing through the thoracic duct comes from the

liver

small intestine

spleen

both A and B are correct

9.

1 point

The lymph taken from what location has the highest concentration of protein?

thymus

spleen

cisterna chyli

thoracic duct

10.

1 point

A person with thymus malfunction would:

produce fewer B cells, thus reducing the effectiveness of the immune system.

produce more T cells, thus reducing the effectiveness of the immune system.

d. produce fewer T cells, thus reducing the effectiveness of the immune system.

experience an inhibition of thymosin, thus creating an increased number of macrophages in the body.

11.

1 point

The tonsils found at the base of the eustachian tubes are called:

palatine tonsils

lingual tonsisl

tubal tonsils

adenoids

12.

1 point

How would muscle contraction affect lymphokinetic action?

There is no association between muscle contraction and lymphokinetic action.

Contraction of the smooth muscle in the thoracic vessel walls prohibits lymphatic vessels from pulsing rhythmically and, thus, helps to keep lymph from moving from one valved segment to the next.

A decreased flow of lymph that occurs with increased physical activity helps return fluid to the cardiovascular system.

Increased external pressure from muscle contraction also increases lymphatic pressure, which results in keeping lymph moving in only one direction.

13.

1 point

Why is having an understanding of the lymphatic drainage of the breast important in formulating the diagnosis and treatment of breast cancer?

The lymphatic drainage will start to clot and decrease further lymphatic drainage.

A single cell of a primary cancer tumor can spread to other areas of the body through the lymphatic system and cause metastasis.

Removing the cancer can stop drainage of blood from the tumor and increase the flow of drainage of lymph from the breast area.

The cancerous breast tissue will decrease lymphatic drainage, thus inhibiting the spreading of the tumor cells.

14.

1 point

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

tonsils

bone marrow

liver

all of the above are part of the lymphatic system