$$V_{lymph} \approx 3\ \text{L/day}$$

Question 1

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

Accepted Answer

Producing hormones that regulate metabolism

Question 2

A patient has a blockage in the right lymphatic duct. Which region of the body would most likely experience lymphedema as a result?

Accepted Answer

Right upper arm

Question 3

Which of the following best describes the structure of lymphatic capillaries?

Accepted Answer

They are blind-ended tubes with overlapping endothelial cells forming one-way minivalves.

Question 4

Which lymphoid organ is responsible for the maturation of T lymphocytes and is most active during childhood?

Accepted Answer

Thymus

Question 5

A patient has a splenectomy (removal of the spleen). Which of the following is a likely consequence?

Accepted Answer

The liver and bone marrow will take over most of the spleen's functions.

Question 6

Which of the following lymphoid tissues is specialized for absorbing dietary fats and delivering chyle to the blood?

Accepted Answer

Lacteals

Question 7

Which of the following best explains why lymph flow is slow and sporadic?

Accepted Answer

Lymph is propelled by skeletal muscle contraction, thoracic pressure changes, and smooth muscle contraction, but lacks a central pump like the heart.

Question 8

Which of the following is TRUE regarding lymph nodes?

Accepted Answer

They filter lymph and activate the immune system.

Question 9

A cancer cell enters the lymphatic capillaries in the foot. Through which sequence will it most likely travel to reach the venous circulation?

Accepted Answer

Lymphatic capillaries → collecting vessels → lymphatic trunk → thoracic duct → subclavian vein

Question 10

Which of the following cells is responsible for producing the reticular fiber stroma that supports other cells in lymphoid organs?

Accepted Answer

Reticular cells

Question 11

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

Accepted Answer

They trap and destroy bacteria and particulate matter, allowing immune cells to build memory.

Question 12

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

Accepted Answer

It lacks B cells and does not directly fight antigens.

Question 13

Which of the following equations best represents the volume of fluid returned to the blood by the lymphatic system each day?

Accepted Answer

$$V_{lymph} \approx 3\ 	ext{L/day}$$

Question 14

Which of the following is the correct order of lymph flow through a lymph node?

Accepted Answer

Afferent vessel → subcapsular sinus → cortex → medulla → efferent vessel

Question 15

Which of the following lymphoid organs is most likely to regenerate in children if a small portion is left after surgery?

Accepted Answer

Spleen

Question 16

Which of the following best describes the role of Peyer's patches in the small intestine?

Accepted Answer

They destroy bacteria and generate memory lymphocytes.

Question 17

Which of the following is a reason why lymph nodes have fewer efferent than afferent vessels?

Accepted Answer

To allow lymphocytes and macrophages more time to function

Question 18

Which of the following is TRUE regarding the development of the lymphatic system?

Accepted Answer

The thymus arises from endoderm, while other lymphatic organs arise from mesoderm.

Question 19

Which of the following best describes the function of B cells in the immune response?

Accepted Answer

They produce plasma cells that secrete antibodies.

Question 20

A patient presents with swollen, tender lymph nodes in the axillary region. Which of the following is the most likely explanation?

Accepted Answer

The lymph nodes are filtering and responding to a local infection.

Lymphatic System: Structure, Function, and Lymphoid Organs

Study Guide - Practice Questions