Question 1

Lymph from the right upper extremity flows through the right lymphatic duct, then into the right subclavian trunk.

Accepted Answer

Lymph from the right upper extremity flows through the right lymphatic duct, then directly into the junction of the right internal jugular and subclavian veins, not the right subclavian trunk.

Question 2

The stroma (framework tissue) of the spleen consists of the capsule, trabeculae, reticular fibers, the red pulp, and the white pulp.

Accepted Answer

The stroma of the spleen consists of the capsule, trabeculae, and reticular fibers, but not the red and white pulp; these are considered part of the spleen's parenchyma, not its stroma.

Question 3

The thoracic duct drains lymph into venous blood at the junction of the left internal jugular vein and left subclavian vein.

Accepted Answer

This statement is true. The thoracic duct is the main duct of the lymphatic system and it drains lymph from the lower and left side of the body into the venous blood at the junction of the left internal jugular and left subclavian veins.

Question 4

The actual size of the thymus gland, defined by its connective tissue capsule, does not change over time.

Accepted Answer

The thymus gland itself may shrink with age due to involution, but the size defined by its connective tissue capsule remains the same.

Question 5

Lymph nodes of the body are arranged into five principal groups.
Name any one group of lymph nodes and describe its location and the region of the body it drains.

Accepted Answer

The answer of Lymph nodes of the body are arranged...

Question 6

Each lobe of the thymus gland consists of an outer cortex and an inner medulla.

Accepted Answer

Each lobe of the thymus gland does indeed consist of an outer cortex and an inner medulla. The cortex contains immature T cells, while the medulla contains more mature T cells and other immune cells.

Question 7

Fluid enters lymphatic capillaries when the pressure in the interstitial fluid spaces is _____ than the pressure inside the lymphatic capillary.
A) greater
B) lesser

Accepted Answer

Fluid enters lymphatic capillaries when the pressure in the interstitial fluid spaces is greater than the pressure inside the lymphatic capillary. This pressure difference allows the fluid to flow into the capillaries, facilitating the return of excess interstitial fluid back to the bloodstream.

Question 8

The flow of lymph through a lymph node is slowed by the anatomical arrangement of many afferent vessels bringing lymph into the node and only one or two efferent vessels transporting lymph out of the lymph node.

Accepted Answer

This is true because the numerous afferent vessels branching out into the lymph node create a complex network that slows down the flow of lymph, allowing more time for immune cells to interact with any harmful substances in the lymph. On the other hand, there are only one or two efferent vessels that carry the filtered lymph out of the node and back into the circulatory system.

Question 9

HIV is killed by rubbing alcohol and household bleach, and by standard dishwashing and clothes washing.

Accepted Answer

Rubbing alcohol and household bleach can effectively kill HIV, and standard dishwashing and clothes washing can also help to eliminate the virus.

Question 10

Lymphatic capillaries in intestinal villi are called
A) MALT
B) cisterna chyli
C) lacteals
D) afferent vessels

Accepted Answer

Lymphatic capillaries in intestinal villi are called lacteals, which are responsible for the absorption of dietary fats and fat-soluble vitamins.

Question 11

The lymphatic vessels arise from the same type of embryonic tissue as do veins.

Accepted Answer

The lymphatic vessels, like veins, arise from mesodermal tissue during embryonic development.

Question 12

Breathing assists the flow of lymph; lymph flows from the abdominal region to the thoracic region every time you _____.
A) exhale
B) inhale

Accepted Answer

Lymph flows from the abdominal region to the thoracic region every time you inhale, and breathing deeply helps to facilitate this flow. Therefore, the best choice is inhale (B).

Question 13

Lymph flows as a result of skeletal muscle contractions, respiratory movements and _____ in lymphatic vessels that prevent backflow.

Accepted Answer

The answer of Lymph flows as a result of skeletal...

Question 14

The parotid, buccal, and submandibular lymph nodes make up the facial group of nodes.

Accepted Answer

The facial group of lymph nodes includes the buccal, nasolabial, and mandibular lymph nodes, not the parotid and submandibular nodes, which belong to different groups.

Question 15

The intestinal trunk drains lymph from the stomach, intestines, pancreas, spleen, and part of the liver.

Accepted Answer

The intestinal trunk is a lymphatic vessel that drains lymph from the stomach, intestines, pancreas, spleen, and part of the liver.

Question 16

Following a splenectomy (surgical removal of a ruptured spleen), some of the spleen's functions can be handled by red bone marrow and the liver.

Accepted Answer

After splenectomy, the liver and red bone marrow take over some of the spleen's functions like producing blood cells and filtering out old or damaged blood cells.

Question 17

Name and describe the location of the two main lymphatic ducts. Describe the portions of the body drained by each.

Accepted Answer

The answer of Name and describe the location of the...

Question 18

List and describe the effects of aging on the lymphatic system.

Accepted Answer

The answer of List and describe the effects of aging...

Question 19

List the nodes that make up the axillary group and state the region of the body drained by each.

Accepted Answer

The answer of List the nodes that make up the...

Question 20

Lymphatic capillaries differ from blood capillaries in that they are closed-ended and they have a slightly _____ diameter than blood capillaries.
A) larger
B) smaller

Accepted Answer

Lymphatic capillaries have a slightly larger diameter compared to blood capillaries, allowing them to absorb larger molecules and particles.

Quiz 15: The Lymphatic System and Immunity