Question 1

Which of the following best describes the primary function of lymphatic capillaries in the human body?

Accepted Answer

They absorb digested fats and deliver chyle to the blood.

Question 2

A patient has a blockage in the right lymphatic duct. Which region of the body would most likely experience lymphatic fluid accumulation (edema)?

Accepted Answer

Right upper arm

Question 3

Which of the following mechanisms does NOT contribute to the movement of lymph through lymphatic vessels?

Accepted Answer

Pumping action of the heart

Question 4

Which structure is responsible for preventing the backflow of lymph within lymphatic vessels?

Accepted Answer

Internal valves within the lymphatic vessels

Question 5

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

Accepted Answer

Its stroma is made up of epithelial cells, not reticular fibers.

Question 6

A 10-year-old child undergoes a splenectomy after trauma. Which of the following consequences is most likely?

Accepted Answer

Reduced ability to remove old or defective blood cells from circulation

Question 7

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

Accepted Answer

To allow lymphocytes and macrophages more time to filter lymph

Question 8

Which of the following is TRUE regarding MALT (mucosa-associated lymphoid tissue)?

Accepted Answer

It protects mucosal surfaces from pathogens.

Question 9

Which of the following best describes the role of dendritic cells in lymphoid tissues?

Accepted Answer

They capture antigens and help activate T cells.

Question 10

A patient with a genetic defect preventing the formation of reticular fibers would have the most direct impairment in which lymphoid organ function?

Accepted Answer

Lymph node filtration and immune cell support

Question 11

Which of the following statements about lymphoid follicles is correct?

Accepted Answer

They contain germinal centers with proliferating B cells.

Question 12

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

Accepted Answer

Immune surveillance and lymphocyte proliferation

Question 13

Which of the following best explains why the thymus is most active during childhood?

Accepted Answer

It is responsible for the maturation of T lymphocytes, which are crucial for developing immune competence.

Question 14

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

Accepted Answer

Transporting oxygen to tissues

Question 15

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

Accepted Answer

They trap bacteria and particulate matter, exposing them to immune cells.

Question 16

A patient with a mutation that prevents the formation of collagen filaments anchoring lymphatic capillaries would most likely experience which of the following?

Accepted Answer

Reduced opening of minivalves in response to increased ECF volume

Question 17

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

Accepted Answer

Spleen – removal of old erythrocytes and immune surveillance

Question 18

Which of the following best explains why physical activity increases lymph flow?

Accepted Answer

It enhances the milking action of skeletal muscles, propelling lymph through vessels.

Question 19

Which of the following is a distinguishing feature of the red pulp of the spleen?

Accepted Answer

It is the site where old blood cells and pathogens are destroyed.

Question 20

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.

The Lymphatic System and Lymphoid Organs: Structure, Function, and Clinical Relevance

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