Question 1

Which of the following best describes the primary function of the lymphatic system in maintaining homeostasis?

Accepted Answer

It maintains fluid balance by returning excess interstitial fluid to the bloodstream.

Question 2

A patient presents with swelling in the lower limbs. Which malfunction of the lymphatic system most likely explains this symptom?

Accepted Answer

Blockage of lymphatic vessels preventing drainage of interstitial fluid

Question 3

Which lymphatic structure is responsible for absorbing dietary lipids from the small intestine?

Accepted Answer

Lacteals

Question 4

What is the main difference between lymphatic capillaries and blood capillaries?

Accepted Answer

Lymphatic capillaries have looser cell junctions, allowing larger molecules to enter.

Question 5

Which of the following best explains why lymph nodes are clinically important in cancer diagnosis and treatment?

Accepted Answer

They filter lymph and can trap metastatic cancer cells, indicating possible spread.

Question 6

Which of the following is a correct pathway for lymph flow from the tissues back to the bloodstream?

Accepted Answer

Lymphatic capillaries → lymphatic venules → lymphatic veins → lymphatic ducts → subclavian veins

Question 7

A patient undergoes a splenectomy after trauma. Which of the following is a likely consequence?

Accepted Answer

Other organs, such as the liver and lymph nodes, compensate for some spleen functions, but infection risk increases.

Question 8

Which of the following best describes the function of the thymus in the immune system?

Accepted Answer

It matures T lymphocytes and secretes thymosins.

Question 9

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

Accepted Answer

Absorption of dietary fats from the small intestine

Question 10

Which of the following statements about lymph nodes is TRUE?

Accepted Answer

They filter lymph through both mechanical and biological processes.

Question 11

A child has repeated throat infections and enlarged tonsils. What is the primary immune function of the tonsils?

Accepted Answer

To intercept and respond to pathogens entering through the mouth and nose

Question 12

Which of the following best describes the role of valves in lymphatic vessels?

Accepted Answer

They prevent backflow, ensuring one-way movement toward the heart.

Question 13

Which lymphatic duct drains lymph from the majority of the body and empties into the left subclavian vein?

Accepted Answer

Thoracic duct

Question 14

Which of the following is a likely outcome if lymphatic drainage is blocked in a region of the body?

Accepted Answer

Edema due to accumulation of interstitial fluid

Question 15

Which of the following best explains why tonsillectomy does not completely compromise the immune system?

Accepted Answer

Other lymphoid tissues compensate for the loss of tonsils.

Question 16

Which of the following is a correct pairing of lymphoid organ and its primary function?

Accepted Answer

Spleen – Filtration of blood and destruction of old red blood cells

Question 17

Which of the following best describes the composition of lymph?

Accepted Answer

It is interstitial fluid that contains proteins, waste, lipids, and immune cells.

Question 18

Which of the following is a unique feature of lymphatic capillaries compared to blood capillaries?

Accepted Answer

They are closed at one end and have overlapping endothelial cells.

Question 19

Which of the following best explains the clinical significance of axillary lymph nodes in breast cancer?

Accepted Answer

They are a common site for metastasis, so are often removed to prevent cancer spread.

Question 20

Which of the following is a function shared by both the spleen and lymph nodes?

Accepted Answer

Immune surveillance and response to pathogens

Lymphatic System and Immunity: Structure, Function, and Clinical Importance

Study Guide - Practice Questions