Question 1

Which of the following best describes the primary function of lymphatic capillaries in peripheral tissues?

Accepted Answer

They absorb excess interstitial fluid and return it to the venous system.

Question 2

A patient develops swelling in their right arm after lymph node removal due to cancer surgery. Which condition is most likely responsible for this symptom?

Accepted Answer

Lymphedema

Question 3

Which lymphatic duct drains lymph from the left side of the head, neck, chest, left upper extremity, and the entire body below the ribs?

Accepted Answer

Thoracic duct

Question 4

Which of the following is NOT a function of the spleen?

Accepted Answer

Maturation of T cells

Question 5

A blockage in the thoracic duct would most directly affect lymph drainage from which region?

Accepted Answer

Left lower limb

Question 6

Which of the following best describes the role of thymosins produced by the thymus?

Accepted Answer

They promote the development of functional T cells.

Question 7

Which of the following lymphocyte types is primarily responsible for antibody-mediated immunity?

Accepted Answer

B lymphocytes

Question 8

Which structure acts as a filter for lymph, removing 99% of antigens before lymph reaches the venous circulation?

Accepted Answer

Lymph node

Question 9

Which of the following best explains why lymphatic capillaries are able to absorb large molecules and pathogens from interstitial fluid?

Accepted Answer

They have overlapping endothelial cells that act as one-way valves.

Question 10

A patient with a splenic injury is at increased risk for which of the following?

Accepted Answer

Reduced ability to remove old red blood cells and bacteria from the blood

Question 11

Which of the following is a correct sequence for the flow of lymph from peripheral tissues to the heart?

Accepted Answer

Lymph capillaries → lymphatic vessels → lymph nodes → lymphatic trunks → lymphatic ducts → subclavian vein → superior vena cava → right atrium

Question 12

Which of the following lymphoid tissues is strategically located to protect against inhaled or ingested pathogens?

Accepted Answer

Tonsils

Question 13

Which of the following best describes the difference between interstitial fluid and lymph?

Accepted Answer

They are essentially the same fluid, but lymph is found within lymphatic vessels.

Question 14

Which of the following is a function of the white pulp of the spleen?

Accepted Answer

Direct attack and destruction of antigens in the blood

Question 15

Which of the following best describes the role of natural killer (NK) cells?

Accepted Answer

They attack foreign cells, cancer cells, and virus-infected body cells.

Question 16

A patient with a congenital absence of the thymus would most likely have which of the following immune deficiencies?

Accepted Answer

Impaired T cell maturation and function

Question 17

Which of the following lymphatic structures is NOT encapsulated and is found in the mucosa of the GI, respiratory, urinary, and reproductive tracts?

Accepted Answer

Lymphatic nodule (MALT)

Question 18

Which of the following best explains why the removal of lymph nodes during cancer surgery can lead to swelling in the affected limb?

Accepted Answer

Lymph nodes filter lymph, and their removal obstructs lymph flow, causing accumulation of interstitial fluid.

Question 19

Which of the following is the main collecting duct of the lymphatic system, and into which vein does it drain?

Accepted Answer

Thoracic duct; left subclavian vein

The Lymphatic System and Immunity: Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards