Question 1

Which of the following best describes the primary function of lymphatic capillaries during inflammation?

Accepted Answer

They absorb cell debris, pathogens, and cancer cells due to increased permeability.

Question 2

What is the correct sequence of lymph flow through the lymphatic system?

Accepted Answer

Lymphatic capillaries → lymphatic vessels → lymphatic trunks → lymphatic ducts

Question 3

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

Accepted Answer

Transporting oxygen to tissues

Question 4

During normal physiology, approximately how much lymph is returned to the blood per day?

Accepted Answer

$$3\ \mathrm{L}$$

Question 5

Which structure acts as a one-way gate, allowing interstitial fluid to enter but not escape from lymphatic capillaries?

Accepted Answer

Endothelial minivalves

Question 6

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

Accepted Answer

Right lymphatic duct

Question 7

Which of the following lymphoid organs is the site of B lymphocyte maturation?

Accepted Answer

Bone marrow

Question 8

What is the main function of Peyer's patches in the small intestine?

Accepted Answer

Destroy bacteria and prevent them from breaching the intestinal wall

Question 9

Which of the following best explains why lymphatic vessels rely on skeletal and respiratory pumps?

Accepted Answer

Lymphatic vessels do not have a central pump like the heart.

Question 10

Which area of the spleen is primarily involved in immune functions and lymphocyte activation?

Accepted Answer

White pulp

Question 11

A patient presents with swelling in the lower limbs due to blockage of lymphatic vessels. Which condition is most likely responsible?

Accepted Answer

Elephantiasis

Question 12

Which lymphoid organ is responsible for the maturation of T lymphocytes and secretes hormones called thymosins?

Accepted Answer

Thymus

Question 13

Which of the following is a secondary lymphoid organ where lymphocytes encounter pathogens and become activated?

Accepted Answer

Lymph node

Question 14

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

Accepted Answer

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

Question 15

Which of the following statements about the spleen is correct?

Accepted Answer

It is the site of fetal erythrocyte production, which normally ceases at birth.

Question 16

Which lymphatic structure is most likely to rupture following a direct blow or severe infection, potentially leading to hemorrhage and shock?

Accepted Answer

Spleen

Question 17

Which of the following is a function of the tonsillar crypts?

Accepted Answer

Trap microbes for immune surveillance

Question 18

Which lymphatic trunk is unpaired and drains lymph from the intestines?

Accepted Answer

Intestinal trunk

Question 19

Which of the following best explains the role of lymphoid nodules in the appendix?

Accepted Answer

They destroy bacteria and prevent them from breaching the intestinal wall.

Question 20

Which of the following equations best represents the volume of lymph returned to the blood per day?

Accepted Answer

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

Lymphatic System: Structure and Function

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