Question 1

Lymphatic capillaries originate in the
A)central nervous system.
B)red bone marrow.
C)yellow bone marrow.
D)tissue spaces between cells.
E)cisterna chyli.

Accepted Answer

Lymphatic capillaries originate in the tissue spaces between cells.

Question 2

Which would be the route taken by lymph traveling from lymphatic vessels in the right leg to the bloodstream?
A)Right lumbar trunk - cisterna chyli - thoracic duct - right subclavian vein
B)Right lumbar trunk - cisterna chyli - thoracic duct - left subclavian vein
C)Right lumbar trunk - right intestinal trunk - right lymphatic duct - right subclavian vein
D)Right femoral trunk - right lumbar trunk - right lymphatic duct - superior vena cava
E)Right femoral trunk - cisterna chyli - thoracic duct - left subclavian vein

Accepted Answer

The lymphatic vessels from the right leg drain into the right lumbar trunk, which then enters the cisterna chyli. From the cisterna chyli, lymph travels up the thoracic duct, which eventually empties into the left subclavian vein. Therefore, option B is the correct answer.

Question 3

Because lymphatic vessels have three tunics (intima,media,and externa)and valves,they structurally resemble
A)veins.
B)arterioles.
C)venules.
D)arteries
E)All of the choices are correct.

Accepted Answer

Lymphatic vessels structurally resemble veins because they have three tunics and valves, which are similar to the tunics and valves found in veins. Arterioles, venules, and arteries do not have these same structural characteristics. Therefore, the best choice is A) veins.

Question 4

Lymph is transported through a network of increasingly larger lymphatic passageways.What is the correct order of these,from smallest diameter to largest diameter?
A)Capillaries - ducts - trunks - vessels
B)Ducts - capillaries - vessels - trunks
C)Vessels - capillaries - trunks - ducts
D)Ducts - vessels - capillaries - trunks
E)Capillaries - vessels - trunks - ducts

Accepted Answer

The correct order from smallest to largest diameter in the lymphatic system is: capillaries, vessels, trunks, and then ducts. Lymphatic capillaries collect the lymph, which then travels through larger lymphatic vessels, continues through lymphatic trunks, and finally moves into the largest ducts before returning to the circulatory system.

Question 5

A lymphatic capillary that picks up dietary lipids in the small intestine is called a(n)
A)cisterna chyli.
B)lacteal.
C)afferent lymphatic vessel.
D)trabeculum.
E)efferent lymphatic vessel.

Accepted Answer

A lymphatic capillary that picks up dietary lipids in the small intestine is called a lacteal.

Question 6

Lymphatic capillaries
A)cannot be discerned structurally from cardiovascular system capillaries.
B)originate as closed-ended tubes associated with blood capillary networks.
C)filter lymph.
D)concentrate lymph prior to passing it to larger lymphatic vessels.
E)include layers of smooth muscle for peristalsis.

Accepted Answer

Lymphatic capillaries are closed-ended tubes that originate as networks associated with blood capillaries. They are structurally distinct from cardiovascular system capillaries. Lymphatic capillaries filter lymph and are not known to include layers of smooth muscle or concentrate lymph prior to passing it to larger vessels.

Question 7

The composition of lymph is most similar to
A)whole blood.
B)blood plasma.
C)interstitial fluid.
D)extracellular fluid.
E)intracellular fluid.

Accepted Answer

The answer of The composition of lymph is most similar...

Question 8

Which is not a function of the lymphatic system?
A)Transports dietary lipids
B)Returns excess interstitial fluid to the bloodstream
C)Houses and develops lymphocytes
D)Generates immune responses
E)No exceptions;all choices are functions of the lymphatic system.

Accepted Answer

All choices listed are functions of the lymphatic system.

Question 9

The thoracic duct and the right lymphatic duct empty lymph into the
A)superior vena cava.
B)subclavian veins.
C)inferior vena cava.
D)azygos vein.
E)brachiocephalic veins.

Accepted Answer

Both the thoracic duct and the right lymphatic duct empty lymph into the subclavian veins, which are located near the base of the neck where they join with the internal jugular veins to form the brachiocephalic veins. From there, the lymphatic fluid is returned to the venous circulation.

Question 10

Which of the lymphatic trunks drain into the cisterna chyli?
A)Intestinal trunks
B)Lumbar trunks
C)Intestinal trunks and lumbar trunks
D)Subclavian trunks and jugular trunks
E)Bronchomediastinal trunks and intestinal trunks

Accepted Answer

The cisterna chyli is a lymphatic sac located at the base of the thoracic duct, which receives lymph from the intestinal trunks and lumbar trunks. Therefore, the correct answer is C, as both the intestinal trunks and lumbar trunks drain into the cisterna chyli. The other options listed drain into different lymphatic vessels or structures.

Question 11

Which is not drained by the right lymphatic duct?
A)Right side of abdomen
B)Right side of thorax
C)Right side of head and neck
D)Right shoulder
E)Right arm

Accepted Answer

The right lymphatic duct drains lymph from the right side of the head and neck, right shoulder, and right arm, as well as the right side of the thorax. It does not drain the right side of the abdomen, which is drained by the thoracic duct.

Question 12

Helper T-lymphocytes are also known as
A)cytotoxic T-lymphocytes.
B)CD8+ cells.
C)CD4+ cells.
D)T8 cells.
E)memory T-lymphocytes.

Accepted Answer

Helper T-lymphocytes are also known as CD4+ cells.

Question 13

Excess interstitial fluid enters lymphatic capillaries
A)by diffusion.
B)through gated channels in response to changes in ion balance.
C)by pinocytosis.
D)by phagocytosis.
E)through one-way flaps.

Accepted Answer

Lymphatic capillaries have one-way flaps that allow excess interstitial fluid to enter but prevent it from leaving once inside. This helps to maintain fluid balance in the body.

Question 14

Lymph
A)is found only when there is a pathological condition that allows it to leak from capillaries.
B)is excess interstitial fluid.
C)is filtered by the spleen.
D)is synthesized by the lymphoid organs.
E)All of the choices are correct.

Accepted Answer

Lymph is excess interstitial fluid that has entered the lymphatic vessels. It is not necessarily found only in pathological conditions and is not synthesized by lymphoid organs. While the spleen plays a role in filtering blood, it does not filter lymph. Therefore, the correct answer is B) is excess interstitial fluid.

Question 15

A variety of lymphatic cells are involved in the immune response.Which is not part of the process?
A)Production of antibodies
B)Direct attack and destruction of foreign or abnormal agents
C)Replication of antigens
D)Formation of memory cells
E)No exceptions;all choices are part of the immune response.

Accepted Answer

The replication of antigens is not a part of the immune response. Antigens are foreign substances that stimulate the production of antibodies and the activation of lymphatic cells. However, the process of replication refers to the reproduction of the antigens themselves, which is not a function of the immune response. Rather, the immune response is focused on recognizing and eliminating the replicated antigens.

Question 16

Which is not a type of lymphatic cell?
A)Macrophage
B)Nurse cell
C)Dendritic cell
D)Lymphocyte
E)Astrocyte

Accepted Answer

Astrocyte is not a type of lymphatic cell. Macrophages, nurse cells, dendritic cells and lymphocytes are all types of lymphatic cells involved in the immune system.

Question 17

Lymphatic capillaries
A)are open at both ends.
B)are smaller in diameter than blood capillaries.
C)have wide gaps between endothelial cells.
D)lack a basement membrane.
E)are abundant in epithelial tissues.

Accepted Answer

The answer of Lymphatic capillaries
A)are open at both ends.
B)are smaller...

Question 18

Which are components of the lymphatic system?
A: Thyroid gland
B: Spleen
C: Red bone marrow
D: Thymus gland
E: Lymph nodes
F: Tonsils
A)a,b,c,d,e,f
B)a,b,c,e,f
C)b,c,e
D)b,c,d,e,f
E)b,c,d,e

Accepted Answer

The components of the lymphatic system are the spleen, red bone marrow, thymus gland, lymph nodes, and tonsils. The thyroid gland is not a component of the lymphatic system. Therefore, choices A, B, C, and E can be eliminated. The only choice that includes all the correct components is D.

Question 19

The thoracic duct collects lymph from all of the following except the
A)abdomen.
B)left leg.
C)right arm.
D)right foot.
E)left shoulder.

Accepted Answer

The thoracic duct collects lymph from most of the body, including the abdomen, left leg, right foot, and left shoulder, but not from the right arm. The right arm's lymph drains into the right lymphatic duct.

Question 20

Of the lymphatic trunks,which ones drain lymph from deep thoracic structures?
A)Jugular trunks
B)Subclavian trunks
C)Bronchomediastinal trunks
D)Intestinal trunks
E)Lumbar trunks

Accepted Answer

The bronchomediastinal trunks drain lymph from deep thoracic structures including the lungs, bronchi, and mediastinum. The other options drain lymph from different areas of the body: Jugular trunks from the head and neck, subclavian trunks from the upper limbs and superficial thoracic wall, intestinal trunks from the digestive organs, and lumbar trunks from the lower limbs, pelvis, and abdominal wall.

Quiz 24: Lymphatic System

Lymphatic capillaries originate in the

Which would be the route taken by lymph traveling from lymphatic vessels in the right leg to the bloodstream?

Because lymphatic vessels have three tunics (intima,media,and externa) and valves,they structurally resemble

Lymph is transported through a network of increasingly larger lymphatic passageways.What is the correct order of these,from smallest diameter to largest diameter?

A lymphatic capillary that picks up dietary lipids in the small intestine is called a(n)

Lymphatic capillaries

The composition of lymph is most similar to

Which is not a function of the lymphatic system?

The thoracic duct and the right lymphatic duct empty lymph into the

Which of the lymphatic trunks drain into the cisterna chyli?

Which is not drained by the right lymphatic duct?

Helper T-lymphocytes are also known as

Excess interstitial fluid enters lymphatic capillaries

Lymph

A variety of lymphatic cells are involved in the immune response.Which is not part of the process?

Which is not a type of lymphatic cell?

Lymphatic capillaries

Which are components of the lymphatic system? A: Thyroid gland B: Spleen C: Red bone marrow D: Thymus gland E: Lymph nodes F: Tonsils

The thoracic duct collects lymph from all of the following except the

Of the lymphatic trunks,which ones drain lymph from deep thoracic structures?