Question 1

Which of the following is a primary function of the lymphatic system?

Accepted Answer

Return interstitial fluid to the cardiovascular system

Question 2

Lymphatic capillaries are uniquely designed to accept which type of particles that blood capillaries cannot?

Accepted Answer

Large proteins and dietary fats

Question 3

Which structure is responsible for draining lymph from the abdominal viscera and ascending parallel to the aorta?

Accepted Answer

Thoracic duct

Question 4

A patient presents with swelling in their lower limbs due to excess interstitial fluid. Which process in the lymphatic system is most likely impaired?

Accepted Answer

Reabsorption of interstitial fluid into lymphatic capillaries

Question 5

Which of the following best describes the flow of lymph through the lymphatic system?

Accepted Answer

Capillaries → vessels → trunks → ducts

Question 6

Which type of lymphocyte is 'thymus-dependent' and makes up approximately 80% of circulating lymphocytes?

Accepted Answer

T cells

Question 7

What is the main function of lacteals in the small intestine?

Accepted Answer

Absorb dietary fats

Question 8

Which of the following is TRUE regarding lymph nodes?

Accepted Answer

They filter lymph and are sites of T and B cell activation

Question 9

Which equation best represents the relationship between hydrostatic pressure and lymph formation?

Accepted Answer

$$J_{lymph} = K (P_{hydrostatic} - P_{osmotic})$$

Question 10

Which of the following is NOT a secondary lymphoid organ?

Accepted Answer

Thymus

Question 11

A researcher is studying the activation of lymphocytes. In which part of the lymph node are B cells primarily found?

Accepted Answer

Outer cortex with germinal centers

Question 12

Which cell type is responsible for producing and secreting antibodies?

Accepted Answer

Plasma cells

Question 13

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

Accepted Answer

They trap pathogens for immune surveillance

Question 14

Which process is most directly responsible for the movement of lymph through lymphatic vessels?

Accepted Answer

Contraction of skeletal and respiratory muscles

Question 15

Which of the following is a correct statement about lymphoid nodules?

Accepted Answer

They contain a central germinal center with dividing lymphocytes

Question 16

Which of the following is the correct sequence for lymphocyte development from stem cells?

Accepted Answer

Hemocytoblasts → lymphoid stem cells → mature lymphocytes

Question 17

Which of the following is a function of reticular cells in lymphatic tissues?

Accepted Answer

Build the connective tissue network of lymphoid organs

Question 18

Which lymphocyte type is most involved in directly killing virus-infected cells?

Accepted Answer

Cytotoxic T cells

Question 19

Which of the following best explains why lymph is under low pressure and requires assistance to flow?

Accepted Answer

Lymphatic vessels lack muscular walls and rely on external forces such as skeletal muscle contraction and respiratory movements

Question 20

A patient has an infection in the oral cavity. Which set of tonsils is most likely to respond first?

Accepted Answer

Palatine tonsils

Lymphatic System: Structure, Function, and Components

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