Question 1

Which of the following best describes the primary function of the lymphatic system in maintaining homeostasis?

Accepted Answer

Returning excess interstitial fluid to the bloodstream and maintaining normal blood volume

Question 2

A patient presents with severe swelling in the lower extremities, as shown in the first image. Which condition is most likely responsible for this presentation?

Accepted Answer

Elephantiasis caused by lymphatic vessel blockage due to parasitic roundworm infection

Question 3

Which of the following is NOT a component of lymph?

Accepted Answer

Red blood cells

Question 4

Refer to the third image. At the arterial end of a capillary, which pressure is greater and what is the result?

Accepted Answer

Hydrostatic pressure is greater, resulting in fluid filtration out of the capillary

Question 5

Which lymphatic organ is most active during childhood and puberty, and atrophies with age?

Accepted Answer

Thymus

Question 6

What is the main function of Peyer’s patches in the lymphatic system?

Accepted Answer

Protecting the respiratory and digestive tracts

Question 7

Which equation best represents the net filtration pressure at the arterial end of a capillary?

Accepted Answer

$$NFP = (P_c - P_i) - (\pi_c - \pi_i)$$

Question 8

Which of the following statements about lymphatic vessels is TRUE?

Accepted Answer

They contain valves to prevent backflow of lymph

Question 9

If blood proteins decrease, what happens to colloid osmotic pressure and the net movement of fluid?

Accepted Answer

Colloid osmotic pressure decreases, causing more fluid to leave capillaries

Question 10

Which lymphatic structure is responsible for the differentiation of lymphocytes into T, B, and NK cells?

Accepted Answer

Bone marrow

Question 11

Which of the following is a primary function of B cell lymphocytes?

Accepted Answer

Production of antibodies

Question 12

Which lymphatic structure absorbs end products of digestion, especially fats?

Accepted Answer

Lacteals

Question 13

A patient with filariasis develops severe edema. Which mechanism best explains this?

Accepted Answer

Blockage of lymphatic drainage causing accumulation of interstitial fluid

Question 14

Which of the following best describes the relationship between hydrostatic and osmotic pressures at the venous end of a capillary?

Accepted Answer

Osmotic pressure is greater, causing fluid to enter the capillary

Question 15

Which equation would you use to calculate the net reabsorption pressure at the venous end of a capillary?

Accepted Answer

$$NRP = (\pi_c - \pi_i) - (P_c - P_i)$$

Question 16

Which of the following is NOT a secondary lymphatic structure?

Accepted Answer

Thymus

Question 17

Which of the following best describes the direction of lymph flow in the body?

Accepted Answer

From tissue spaces toward the venous system

Question 18

Which of the following is a plausible consequence of impaired lymphatic drainage?

Accepted Answer

Edema due to accumulation of interstitial fluid

Question 19

Which of the following is TRUE regarding lymphatic capillaries?

Accepted Answer

They are lined by a single layer of endothelial cells

Question 20

Which of the following best explains why lymphatic vessels have valves?

Accepted Answer

To prevent backflow and ensure unidirectional flow of lymph

The Lymphatic System: Structure, Function, and Clinical Relevance

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