Question 1

Which of the following best describes the primary function of the lymphatic system?

Accepted Answer

To return fluids leaked from blood vessels back to the blood and provide structural support for the immune system

Question 2

Which of the following structures is NOT considered a secondary lymphoid organ?

Accepted Answer

Thymus

Question 3

Lymphatic capillaries are more permeable than blood capillaries due to which specialized structure?

Accepted Answer

Overlapping endothelial cells forming one-way minivalves

Question 4

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

Accepted Answer

Lymphatic vessels have valves that prevent backflow

Question 5

A patient has a blockage in the thoracic duct. Which region of the body would most likely experience impaired lymph drainage?

Accepted Answer

Left leg

Question 6

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

Accepted Answer

Pumping action of the heart

Question 7

Which of the following is a function of the spleen?

Accepted Answer

Cleansing blood of aged blood cells and platelets

Question 8

Which lymphoid tissue is specialized for the absorption of dietary fats in the small intestine?

Accepted Answer

Lacteals

Question 9

A patient presents with swollen, tender lymph nodes following a bacterial infection. What is the most likely explanation for this finding?

Accepted Answer

The lymph nodes are overwhelmed by the pathogens they are filtering

Question 10

Which of the following statements about the thymus is TRUE?

Accepted Answer

It is the site of T cell maturation and does not directly fight antigens

Question 11

Which of the following best describes the role of lymph nodes in the immune response?

Accepted Answer

They filter lymph and provide a site for lymphocyte activation

Question 12

Which of the following is a distinguishing feature of lymphoid follicles (nodules) compared to diffuse lymphoid tissue?

Accepted Answer

They contain tightly packed lymphoid cells and germinal centers

Question 13

Which of the following is TRUE regarding the structure of lymphatic capillaries?

Accepted Answer

They are blind-ended tubes with overlapping endothelial cells

Question 14

Which of the following best explains why the CNS does not contain lymphatic capillaries?

Accepted Answer

The CNS uses cerebrospinal fluid (CSF) for drainage instead

Question 15

Which of the following is a correct pairing of lymphatic duct and the region it drains?

Accepted Answer

Thoracic duct – left arm

Question 16

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 17

A patient has a ruptured spleen following a car accident. Which of the following is a potential consequence if the spleen is removed?

Accepted Answer

Decreased ability to filter bloodborne pathogens

Question 18

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

Accepted Answer

They trap bacteria and particulate matter to expose them to immune cells

Question 19

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

Accepted Answer

Destruction of bacteria and generation of memory lymphocytes

Question 20

Which of the following best explains why physical activity increases lymph flow?

Accepted Answer

It enhances the milking action of skeletal muscles and pressure changes during breathing

The Lymphatic System: Structure, Function, and Clinical Relevance

Study Guide - Practice Questions