Question 1

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

Accepted Answer

They collect interstitial fluid and allow larger molecules, such as proteins and pathogens, to enter the lymphatic system.

Question 2

Which organ is responsible for filtering blood, removing old red blood cells, and housing immune cells such as lymphocytes and macrophages?

Accepted Answer

Spleen

Question 3

A patient presents with swelling and pain in the lower leg after a bacterial infection. Which process is most likely responsible for this symptom?

Accepted Answer

Accumulation of interstitial fluid due to blocked lymphatic vessels

Question 4

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

Accepted Answer

Producing insulin for glucose regulation

Question 5

Which structure is most directly involved in the maturation of T lymphocytes?

Accepted Answer

Thymus

Question 6

Which of the following equations best represents the relationship between interstitial fluid volume ($V_{if}$), lymphatic uptake rate ($R_{lymph}$), and time ($t$) in a healthy tissue?

Accepted Answer

$V_{if} = R_{lymph} 	imes t$

Question 7

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

Accepted Answer

Lacteal

Question 8

A cancer cell metastasizes and travels to a distant lymph node. Which property of lymphatic vessels facilitates this process?

Accepted Answer

Their one-way flow toward the heart

Question 9

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

Accepted Answer

They possess minivalves that open in response to increased interstitial fluid volume.

Question 10

Which immune cell type is primarily responsible for phagocytosis of pathogens and presentation of antigens to lymphocytes?

Accepted Answer

Macrophage

Question 11

Which of the following is a mucosa-associated lymphatic tissue (MALT) that protects the body from pathogens entering through the oral cavity?

Accepted Answer

Tonsil

Question 12

If the rate of lymph transport ($R_{lymph}$) decreases due to blockage, what is the most likely physiological consequence?

Accepted Answer

Accumulation of interstitial fluid and tissue swelling (edema)

Question 13

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

Accepted Answer

They activate lymphocytes by presenting antigens.

Question 14

Which equation correctly represents the flow of lymph ($F_{lymph}$) through a lymphatic vessel, given pressure difference ($\Delta P$) and resistance ($R$)?

Accepted Answer

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

Question 15

Which lymphatic organ acts as a site for immune cell activation and proliferation in response to antigens filtered from lymph?

Accepted Answer

Lymph node

Question 16

Which of the following is a correct sequence for the flow of lymph from peripheral tissues to the venous system?

Accepted Answer

Lymphatic capillaries → collecting lymphatic vessels → lymphatic trunks → lymphatic ducts → venous system

Question 17

Which of the following best explains why cancer cells can metastasize via the lymphatic system?

Accepted Answer

Lymphatic vessels provide a route for cells to travel throughout the body due to their permeability and one-way flow.

Question 18

Which of the following is a key difference between lymphatic capillaries and blood capillaries?

Accepted Answer

Lymphatic capillaries have minivalves that open in response to increased interstitial fluid volume.

Question 19

Which lymphatic tissue is found in the small intestine and is specialized for immune surveillance of ingested pathogens?

Accepted Answer

Peyer's patches

Lymphatic System & Immunity: Structure, Function, and Major Organs

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