Question 1

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

Accepted Answer

Synthesizes plasma proteins for blood clotting

Question 2

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

Accepted Answer

Overlapping endothelial cells forming one-way minivalves and anchoring by collagen filaments

Question 3

Which lymphatic structure is responsible for absorbing digested fats and delivering fatty lymph (chyle) to the blood?

Accepted Answer

Lacteals

Question 4

A patient presents with severe localized edema after cancer surgery. Which condition is most likely responsible?

Accepted Answer

Lymphedema

Question 5

Which mechanism does NOT contribute to lymph transport through lymphatic vessels?

Accepted Answer

High-pressure arterial flow

Question 6

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 7

What is the main function of the white pulp in the spleen?

Accepted Answer

Immune function, containing mostly lymphocytes on reticular fibers

Question 8

Which equation best represents the volume of interstitial fluid returned to the blood by the lymphatic system per day?

Accepted Answer

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

Question 9

Which of the following cells is responsible for producing antibodies?

Accepted Answer

Plasma cells

Question 10

A patient has swollen, tender lymph nodes that are pus-filled. What is the most likely diagnosis?

Accepted Answer

Buboes

Question 11

Which lymphatic duct drains lymph from the right upper arm and right side of the head and thorax?

Accepted Answer

Right lymphatic duct

Question 12

Which of the following best describes the role of reticular cells in lymphoid organs?

Accepted Answer

Produce reticular fibers that form the stroma, providing scaffolding for immune cells

Question 13

Which lymphoid tissue is found in mucous membranes and protects against pathogens entering the body?

Accepted Answer

MALT (mucosa-associated lymphoid tissue)

Question 14

Which of the following is TRUE regarding the circulation of lymph in a lymph node?

Accepted Answer

Lymph enters via afferent lymphatic vessels and exits via efferent vessels

Question 15

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

Accepted Answer

Destroy bacteria and generate memory lymphocytes

Question 16

Which cell type is most abundant in the germinal centers of lymphoid follicles?

Accepted Answer

B cells

Question 17

Which of the following best explains why cancer-infiltrated lymph nodes are usually not painful?

Accepted Answer

Cancer cells do not trigger an inflammatory response

Question 18

Which equation describes the relationship between lymph flow ($Q_{lymph}$), pressure difference ($\Delta P$), and resistance ($R$) in the lymphatic system?

Accepted Answer

$Q_{lymph} = \frac{\Delta P}{R}$

Question 19

Which lymphoid organ is most active and largest in size during childhood, then gradually atrophies with age?

Accepted Answer

Thymus

Question 20

Which of the following is a secondary lymphoid organ where mature lymphocytes first encounter their antigen and become activated?

Accepted Answer

Lymph node

Lymphatic System and Lymphoid Organs: Structure, Function, and Clinical Aspects

Study Guide - Practice Questions

Study Guide - Flashcards