Question 1

Which of the following best describes the function of lymphatic capillaries as shown in the provided images and text?

Accepted Answer

They are closed-ended vessels that absorb interstitial fluid and large particles, such as proteins and pathogens, from tissues.

Question 2

A patient presents with severe localized edema after lymphatic vessels were removed during cancer surgery. What is the most likely explanation for this condition?

Accepted Answer

Lymphedema, caused by impaired lymphatic drainage and accumulation of interstitial fluid.

Question 3

Which of the following statements about the structure of lymph nodes is correct?

Accepted Answer

The cortex contains follicles with germinal centers rich in dividing B cells, while the medulla contains medullary cords with B cells, T cells, and plasma cells.

Question 4

Which lymphatic duct drains lymph from the right upper arm and right side of the head and thorax?

Accepted Answer

Right lymphatic duct

Question 5

What is the main function of the white pulp in the spleen?

Accepted Answer

It is the site where immune functions occur, containing mostly lymphocytes on reticular fibers.

Question 6

Which of the following is a unique feature of the thymus compared to other lymphoid organs?

Accepted Answer

Its stroma is made up of epithelial cells, not reticular fibers.

Question 7

A 10-year-old child has a splenectomy after trauma. Which organs will most likely compensate for the loss of splenic function?

Accepted Answer

Liver and bone marrow

Question 8

Which of the following best explains why lymph flows in only one direction, toward the heart?

Accepted Answer

Lymphatic vessels have one-way valves and are propelled by skeletal muscle contraction and thoracic pressure changes.

Question 9

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

Accepted Answer

Producing erythrocytes for oxygen transport

Question 10

A patient has swollen, tender lymph nodes after a bacterial infection. What is the most likely cause of this swelling?

Accepted Answer

The lymph nodes are overwhelmed by the pathogens they are trying to destroy, resulting in inflammation and accumulation of immune cells (buboes).

Question 11

Which of the following best describes the role of reticular cells in lymphoid organs?

Accepted Answer

They produce reticular fibers that form the stroma, providing a scaffold for immune cells.

Question 12

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 13

Which of the following statements about MALT (mucosa-associated lymphoid tissue) is correct?

Accepted Answer

It protects mucosal surfaces from pathogens and includes tonsils, Peyer’s patches, and the appendix.

Question 14

Which of the following best explains why the thymus does not directly fight antigens?

Accepted Answer

It contains a blood-thymus barrier that isolates developing T cells from antigens to prevent premature activation.

Question 15

A blockage in the thoracic duct would most likely result in which of the following?

Accepted Answer

Edema in the lower limbs and left side of the body due to impaired lymph drainage.

Question 16

Which of the following is a function of Peyer’s patches in the small intestine?

Accepted Answer

They destroy bacteria and generate memory lymphocytes to prevent intestinal wall breach.

Question 17

Which of the following mechanisms does NOT contribute to the movement of lymph through lymphatic vessels?

Accepted Answer

High-pressure pumping by the heart

Question 18

Which of the following best describes the function of tonsillar crypts?

Accepted Answer

They trap bacteria and particulate matter, exposing them to immune cells to build memory.

Question 19

Which of the following is true regarding the development of lymphoid organs?

Accepted Answer

The thymus develops from endodermal origin as an outgrowth of the pharynx, while other lymphoid organs arise from mesoderm.

Question 20

Which of the following best explains why cancer-infiltrated lymph nodes are usually not painful, while infected nodes are tender?

Accepted Answer

Cancerous nodes are swollen due to trapped cancer cells but lack the acute inflammation that causes pain in infected nodes.

Lymphatic System and Lymphoid Organs: Structure, Function, and Clinical Aspects

Study Guide - Practice Questions

Study Guide - Flashcards