Question 1

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

Accepted Answer

Producing red blood cells for circulation

Question 2

Lymphatic capillaries are able to take up proteins, cell debris, pathogens, and cancer cells primarily because:

Accepted Answer

They have one-way minivalves formed by loosely joined endothelial cells

Question 3

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

Accepted Answer

Right lymphatic duct

Question 4

Lymph is ultimately returned to the bloodstream at the junction of which two veins?

Accepted Answer

Internal jugular and subclavian veins

Question 5

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

Accepted Answer

Active pumping by the heart

Question 6

Which cell type is responsible for producing antibodies in the lymphatic system?

Accepted Answer

Plasma cells (derived from B cells)

Question 7

What is the primary histological tissue type found in lymphoid organs that provides structural support?

Accepted Answer

Reticular connective tissue

Question 8

Which of the following best describes the function of lymph nodes?

Accepted Answer

They filter lymph and activate the immune response

Question 9

A patient has swelling in the right arm and right side of the head. Which lymphatic duct is most likely obstructed?

Accepted Answer

Right lymphatic duct

Question 10

Which region of the lymph node contains tightly packed lymphoid follicles with germinal centers?

Accepted Answer

Cortex

Question 11

Which of the following is TRUE regarding the spleen?

Accepted Answer

It is located inferior to the diaphragm in the left abdominal cavity

Question 12

Which of the following best describes the role of macrophages in lymphoid organs?

Accepted Answer

They phagocytize foreign substances and help activate T cells

Question 13

Which of the following is a secondary lymphoid organ?

Accepted Answer

Spleen

Question 14

If the valves in lymphatic vessels fail, which of the following is most likely to occur?

Accepted Answer

Lymph will backflow, leading to edema

Question 15

Which of the following equations best represents the relationship between lymph flow ($Q$), pressure difference ($\Delta P$), and resistance ($R$) in a lymphatic vessel?

Accepted Answer

$Q = \frac{\Delta P}{R}$

Question 16

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

Accepted Answer

Immune surveillance and response

Question 17

A blockage in the thoracic duct would most directly affect lymph drainage from which part of the body?

Accepted Answer

Left leg

Question 18

Which of the following best describes the role of reticular fibers in lymphoid tissue?

Accepted Answer

They provide structural support for lymphocytes and other cells

Question 19

Which of the following statements about lymphatic capillaries is FALSE?

Accepted Answer

They have tightly joined endothelial cells forming impermeable walls

Question 20

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

Accepted Answer

Afferent vessels → subcapsular sinus → medullary sinuses → efferent vessels

The Lymphatic System and Lymphoid Organs & Tissues: Structure, Function, and Cellular Composition

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