Question 1

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

Accepted Answer

They absorb and transport digested fats from the intestine to the blood.

Question 2

A patient presents with severe localized edema in the right arm following breast cancer surgery. Which mechanism best explains this condition?

Accepted Answer

Blockage or removal of lymphatic vessels, leading to insufficient lymph return.

Question 3

Which of the following statements about lymph node structure is correct?

Accepted Answer

There are more afferent vessels feeding the node than efferent vessels draining it.

Question 4

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 5

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

Accepted Answer

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

Question 6

Which of the following best describes the function of the white pulp in the spleen?

Accepted Answer

It is the site where immune functions occur, mainly involving lymphocytes.

Question 7

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

Accepted Answer

Contraction of cardiac muscle in the vessel walls

Question 8

A patient with metastatic cancer is found to have swollen but non-tender lymph nodes. What is the most likely explanation for this finding?

Accepted Answer

The lymph nodes are overwhelmed by cancer cells that have become trapped.

Question 9

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

Accepted Answer

They capture antigens and present them to T cells for activation.

Question 10

Which of the following is a function of mucosa-associated lymphoid tissue (MALT)?

Accepted Answer

It protects body entryways from pathogens.

Question 11

Which of the following statements about the thymus is correct?

Accepted Answer

It is the site of T lymphocyte maturation and is most active during childhood.

Question 12

Which of the following best explains why lymphatic capillaries are more permeable than blood capillaries?

Accepted Answer

Their endothelial cells overlap loosely to form one-way minivalves.

Question 13

A patient with a severe infection develops red streaks on the skin that are tender to the touch. What is the most likely diagnosis?

Accepted Answer

Lymphangitis

Question 14

Which of the following is a correct pathway for lymph flow from the right arm back to the bloodstream?

Accepted Answer

Right lymphatic duct → junction of right internal jugular and right subclavian veins

Question 15

Which of the following best describes the function of Peyer’s patches?

Accepted Answer

They prevent bacteria from breaching the intestinal wall and generate memory lymphocytes.

Question 16

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

Accepted Answer

It has a blood-thymus barrier to prevent premature activation of T cells.

Question 17

Which of the following best explains why lymph flow through a lymph node is slow?

Accepted Answer

There are fewer efferent vessels than afferent vessels, allowing time for immune functions.

Question 18

Which of the following is a correct description of the function of reticular cells in lymphoid tissues?

Accepted Answer

They form the reticular fiber stroma that supports other cell types.

Question 19

Which of the following best describes the role of lymph nodes in the immune system?

Accepted Answer

They filter lymph and provide sites for immune cell activation.

Question 20

A patient with a history of repeated tonsillitis is found to have enlarged palatine tonsils. Which of the following best explains the immune function of these tonsils?

Accepted Answer

They contain crypts that trap debris and bacteria, allowing immune cells to build memory.

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

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