Q: Which equation best represents the volume of lymph returned to the blood daily?

$$V_{lymph} = 3\ \text{L/day}$$

Question 1

Which of the following best describes the function of lymphatic capillaries in the loose connective tissue of the body?

Accepted Answer

They take up proteins, cell debris, pathogens, and cancer cells due to their high permeability.

Question 2

Which structure is responsible for preventing the collapse of lymphatic capillaries and allowing one-way flow of lymph?

Accepted Answer

Collagen filaments anchoring endothelial cells

Question 3

A patient presents with chronic swelling of the limbs due to accumulation of lymph fluid. Which disorder is most likely responsible?

Accepted Answer

Lymphedema

Question 4

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

Accepted Answer

Thoracic duct

Question 5

Which of the following is NOT a function of the spleen?

Accepted Answer

Production of antibodies by B cells

Question 6

Which equation best represents the volume of lymph returned to the blood daily?

Accepted Answer

$$V_{lymph} = 3\ 	ext{L/day}$$

Question 7

Which of the following cells is primarily responsible for marking antigens for destruction by phagocytosis?

Accepted Answer

B cells (via plasma cells secreting antibodies)

Question 8

Which lymphoid organ is the site of T cell maturation and does NOT directly fight antigens?

Accepted Answer

Thymus

Question 9

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

Accepted Answer

There are more afferent vessels than efferent vessels, causing stagnation.

Question 10

Which of the following is a specialized lymphatic capillary found in the intestinal mucosa that transports absorbed fat?

Accepted Answer

Lacteal

Question 11

Which equation describes the relationship between lymph flow ($$Q$$), pressure difference ($$\Delta P$$), and resistance ($$R) in $$lymphatic vessels?

Accepted Answer

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

Question 12

Which of the following is TRUE regarding the structure of lymph nodes?

Accepted Answer

The cortex contains follicles with germinal centers rich in dividing B cells.

Question 13

Which of the following is a major function of MALT (Mucosa-associated Lymphoid Tissue)?

Accepted Answer

Protection from pathogens entering the body through mucous membranes

Question 14

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

Accepted Answer

They capture antigens and deliver them to lymph nodes, helping activate T cells.

Question 15

Which of the following lymphoid organs is NOT fully encapsulated and contains crypts that trap pathogens?

Accepted Answer

Tonsils

Question 16

Which of the following is a real-world consequence of lymphatic filariasis (elephantiasis)?

Accepted Answer

Chronic swelling and thickening of skin due to parasitic infection

Question 17

Which equation would you use to estimate the rate of lymph formation ($$R_{lymph}) if $$you know the net filtration pressure ($$NFP) $$and the filtration coefficient ($$K_f$$)?

Accepted Answer

$$R_{lymph} = NFP 	imes K_f$$

Question 18

Which of the following is TRUE regarding the developmental aspects of the lymphatic system?

Accepted Answer

Thymus is the first lymphoid organ to appear and forms as an outgrowth of the pharynx.

Question 19

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 20

Which of the following is a plausible explanation for why cancerous lymph nodes are usually swollen but not painful?

Accepted Answer

Cancer cells do not trigger an inflammatory response in the lymph node.

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

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