Question 1

Which of the following best describes the main function of lymphatic vessels in the human body?

Accepted Answer

They collect excess interstitial fluid and return it to the bloodstream.

Question 2

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

Accepted Answer

Right upper arm

Question 3

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

Accepted Answer

Synthesizing glucose from amino acids

Question 4

Which lymphatic organ is the primary site for the maturation of T-cells?

Accepted Answer

Thymus gland

Question 5

A lymph node is structurally divided into a stroma and a parenchyma. Which of the following is found in the parenchyma?

Accepted Answer

Cortex and medulla containing lymphocytes

Question 6

Which of the following statements about lymphatic capillaries is TRUE?

Accepted Answer

They are blind-ended and highly permeable to interstitial fluid.

Question 7

Which of the following best explains why lymph nodes have fewer efferent than afferent vessels?

Accepted Answer

To allow lymphocytes and macrophages more time to filter lymph

Question 8

A patient presents with enlarged, firm, and non-tender lymph nodes. This finding is most consistent with which of the following?

Accepted Answer

Metastatic cancer

Question 9

Which of the following is a function of the spleen?

Accepted Answer

Phagocytosis of worn-out red blood cells

Question 10

Which of the following best describes the flow of lymph from the tissues back to the bloodstream?

Accepted Answer

Capillaries → interstitial spaces → lymphatic capillaries → lymphatic vessels → lymphatic ducts → subclavian veins

Question 11

Which of the following lymphatic structures is responsible for filtering lymph and initiating immune responses?

Accepted Answer

Lymph nodes

Question 12

Which of the following is TRUE regarding the thoracic duct?

Accepted Answer

It drains lymph from the majority of the body except the right upper quadrant.

Question 13

Which of the following best describes the role of B-cells in the lymphatic system?

Accepted Answer

They differentiate into plasma cells that secrete antibodies.

Question 14

Which of the following is a characteristic of lymphatic vessels that distinguishes them from veins?

Accepted Answer

They have more internal valves than veins.

Question 15

A patient suffers a ruptured spleen after a car accident. Which of the following is a likely consequence if the spleen is not removed?

Accepted Answer

Interperitoneal hemorrhage and shock

Question 16

Which of the following best explains why the lymphatic system is considered a 'pump-less' system?

Accepted Answer

Lymph is propelled by skeletal muscle contractions and thoracic pressure changes.

Question 17

Which of the following lymphoid tissues is NOT surrounded by a capsule?

Accepted Answer

Lymphoid nodule

Question 18

Which of the following is TRUE regarding the development of the thymus gland?

Accepted Answer

It reaches its maximum size at puberty and then atrophies.

Question 19

Which of the following best describes the function of the tonsils?

Accepted Answer

They protect against inhaled or ingested foreign substances.

Question 20

Which of the following equations best represents the volume of lymph returned to the bloodstream every 24 hours?

Accepted Answer

$$V_{lymph} = 3\ 	ext{L}$$

The Lymphatic System: Structure, Function, and Clinical Relevance

Study Guide - Practice Questions