Question 1

What is the purpose of lacteals?
A)Drain blood from the spleen.
B)Absorb fluid from capillary beds.
C)Absorb lipids from the digestive tract.
D)Absorb solutes from interstitial spaces.

Accepted Answer

Lacteals are lymphatic vessels that are specialized in the absorption of lipids from the digestive tract. They are located in the small intestine and play a crucial role in transporting dietary fats and fat-soluble vitamins, such as vitamins A, D, E, and K, from the intestines to the bloodstream.

Question 2

Which of the following is NOT a function of the lymphatic system?
A)Defending from infection caused by microorganisms and other foreign substances.
B)Aiding in erythropoiesis of red blood cells.
C)Maintaining fluid balance by returning excess interstitial fluid to the blood.
D)Absorbing and transporting lipids from the digestive tract.

Accepted Answer

Aiding in erythropoiesis of red blood cells is not a function of the lymphatic system. Erythropoiesis occurs in the bone marrow. The functions of the lymphatic system include defending from infection caused by microorganisms and other foreign substances, maintaining fluid balance by returning excess interstitial fluid to the blood, and absorbing and transporting lipids from the digestive tract.

Question 3

How do lymphatic capillaries differ form blood capillaries?
A)Lymphatic capillaries do not have a basement membrane.
B)Simple squamous epithelial cells of lymphatics overlap with loose attachments.
C)Lymphatic capillaries are more permeable than blood capillaries.
D)Lymphatic capillary epithelium act as one-way valves preventing movement of fluid back into interstitial spaces.
E)All of the choices are ways lymphatic capillaries differ from blood capillaries.

Accepted Answer

All of the choices are ways lymphatic capillaries differ from blood capillaries. Lymphatic capillaries do not have a basement membrane, and instead have simple squamous epithelial cells that overlap with loose attachments. They are also more permeable than blood capillaries and have epithelium that act as one-way valves, preventing movement of fluid back into interstitial spaces.

Question 4

The right lymphatic duct drains lymph from the
A)abdomen.
B)upper part of the body.
C)right arm,right chest,and right side of head.
D)right side of the body.
E)left arm,left chest,and left side of head.

Accepted Answer

The right lymphatic duct drains lymph from the right arm, right chest, and right side of the head.

Question 5

What structural feature of lymphatic vessels is responsible to forward movement of lymph?
A)over-lapping endothelial cells
B)valves
C)no basement membrane
D)thin walls

Accepted Answer

Valves are responsible for the forward movement of lymph in the lymphatic vessels. They prevent the backflow of lymph and assist in its flow towards the heart. Overlapping endothelial cells, no basement membrane, and thin walls are other structural features of lymphatic vessels, but they do not directly contribute to the forward movement of lymph.

Question 6

Structurally,lymph vessels are most similar to
A)veins.
B)arteries.
C)arterioles.
D)capillaries.
E)venules.

Accepted Answer

Lymph vessels have a similar structure to veins, with thin walls and valves to prevent backflow of fluid. Arteries, arterioles, and capillaries have thicker walls and different functions than lymph vessels. Venules, while similar to veins, do not have valves like lymph vessels and veins.

Question 7

Lacteals are
A)a type of lymphocyte.
B)a nonspecific defense.
C)lymphatic vessels in the lining of the small intestine.
D)the sinuses inside a lymph node.
E)germinal centers.

Accepted Answer

Lacteals are lymphatic vessels found in the lining of the small intestine that are responsible for absorbing fats and fat-soluble vitamins into the lymphatic system.

Question 8

A woman has her right breast and right axillary lymph nodes removed.Which of the following might occur?
A)Cisterna chyli flow increases.
B)The thoracic duct would be severed.
C)Right lymphatic duct drainage decreases causing edema in the right arm.
D)Lymph drainage would be affected in her left arm.
E)Lymph drainage would be affected in both legs.

Accepted Answer

Removal of the right breast and right axillary lymph nodes could result in decreased drainage from the right lymphatic duct, causing edema in the right arm. The cisterna chyli and thoracic duct are located in the left side of the body and would not be affected by this procedure. Lymph drainage in the left arm or legs would also not be affected.

Question 9

The lymphatic system plays a role in maintaining fluid balance within the body by
A)adding lymph to GI tract secretions.
B)returning interstitial fluid to the plasma.
C)transporting lymph from tissues to the liver.
D)carrying excess fluid to the kidneys to be excreted.
E)actively absorbing fluid from the blood.

Accepted Answer

The lymphatic system returns interstitial fluid (fluid that surrounds the body's cells) that has leaked out of blood vessels to the bloodstream. This helps to maintain fluid balance within the body.

Question 10

Which of the following organs does NOT contain lymphatic tissue?
A)liver
B)spleen
C)lingual tonsils
D)thymus
E)pharyngeal tonsils.

Accepted Answer

The liver does not contain lymphatic tissue. It is considered part of the digestive system rather than the lymphatic system.

Question 11

Lymph nodules are
A)small,bean-shaped structures.
B)the site of erythrocyte production.
C)located in the loose connective tissue of the digestive system.
D)composed of an outer cortex and inner medulla.
E)connected together in a series.

Accepted Answer

Lymph nodules are small, localized collections of lymphoid tissue found in the loose connective tissue of the digestive system, such as in the Peyer's patches of the small intestine. They are not structured like lymph nodes, which have an outer cortex and inner medulla, nor are they connected in a series.

Question 12

The lymphatic system is involved in
A)lipid absorption from the digestive tract.
B)transporting lymph from the intestines to the liver.
C)maintenance of pH in the tissues.
D)production of erythrocytes.
E)protein metabolism.

Accepted Answer

The answer of The lymphatic system is involved in
A)lipid absorption...

Question 13

The thoracic duct drains lymph into the
A)left subclavian vein.
B)right subclavian vein.
C)right internal jugular vein.
D)left brachiocephalic vein.
E)left subclavian artery.

Accepted Answer

The thoracic duct drains lymph from the left side of the head, neck, and chest, as well as the entire lower body, into the left subclavian vein.

Question 14

Lymph movement is assisted by
A)contraction of skeletal muscle.
B)contraction of smooth muscle in lymph vessel.
C)pressure changes in the thorax during respiration.
D)compression of lymphatic vessels.
E)All of these choices are correct.

Accepted Answer

All of these choices are correct. Contraction of skeletal and smooth muscles helps to move lymph through the vessels. Pressure changes in the thorax during respiration also assist in lymph movement. Compression of the lymphatic vessels, such as during massage or exercise, can also aid in lymphatic flow.

Question 15

The lymphatic system differs from the cardiovascular system in that
A)the lymphatic system only carries fluid away from tissues.
B)the lymphatic vessels have their own "pump" to assist flow.
C)lymph capillaries do not contain any fluid.
D)lymph capillaries allow free movement of fluid in and out of the capillaries.
E)lymph circulates fluids and cardiovascular does not.

Accepted Answer

The answer of The lymphatic system differs from the cardiovascular...

Question 16

Nonencapsulated lymphatic tissue called MALT includes all of the following except:
A)tonsils.
B)Peyer patches.
C)lymph nodes.
D)diffuse lymphatic tissue.

Accepted Answer

Lymph nodes are not considered MALT because they are encapsulated with a fibrous capsule. MALT includes all other types of lymphatic tissue that are not encapsulated, such as tonsils, Peyer patches, and diffuse lymphatic tissue.

Question 17

Peyer patches are lymphatic nodules found in the
A)lymph nodes.
B)spleen and tonsils.
C)appendix and tonsils.
D)small intestine and appendix.

Accepted Answer

Peyer patches are lymphatic nodules found in the small intestine and appendix. They are important in detecting and responding to potential pathogens in the intestinal tract.

Question 18

Lymphatic tissue contains an interlaced network of reticular fibers that functions to
A)produce lymphocytes.
B)produce capsules around lymph nodes.
C)attack microorganisms.
D)line the walls of lymphatic vessels.
E)trap microorganisms.

Accepted Answer

The answer of Lymphatic tissue contains an interlaced network of...

Question 19

Lymph capillaries are found in the
A)epidermis.
B)cornea.
C)bone marrow.
D)central nervous system.
E)dermis.

Accepted Answer

Lymph capillaries are present in the dermis, which is the layer of skin beneath the epidermis. They are not found in the epidermis, cornea, bone marrow, or central nervous system.

Question 20

Lymph containing a high lipid content is called
A)chyle.
B)chyme.
C)lacteal.
D)interstitial fluid.

Accepted Answer

Lymph containing a high lipid content is called chyle, which is produced by the lymphatic system in the small intestines during digestion. It is milky-white in color due to the presence of lipids, and it eventually enters the bloodstream through the thoracic duct. Options B, C, and D are incorrect as they do not refer to lymph with a high lipid content.

Quiz 22: Lymphatic System and Immunity

What is the purpose of lacteals?

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

How do lymphatic capillaries differ form blood capillaries?

The right lymphatic duct drains lymph from the

What structural feature of lymphatic vessels is responsible to forward movement of lymph?

Structurally,lymph vessels are most similar to

Lacteals are

A woman has her right breast and right axillary lymph nodes removed.Which of the following might occur?

The lymphatic system plays a role in maintaining fluid balance within the body by

Which of the following organs does NOT contain lymphatic tissue?

Lymph nodules are

The lymphatic system is involved in

The thoracic duct drains lymph into the

Lymph movement is assisted by

The lymphatic system differs from the cardiovascular system in that

Nonencapsulated lymphatic tissue called MALT includes all of the following except:

Peyer patches are lymphatic nodules found in the

Lymphatic tissue contains an interlaced network of reticular fibers that functions to

Lymph capillaries are found in the

Lymph containing a high lipid content is called