Question 1

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

Accepted Answer

They return leaked fluid from tissues back to the blood.

Question 2

A patient presents with severe swelling in one leg after a surgical removal of lymph nodes. Which condition is most likely responsible for this symptom?

Accepted Answer

Lymphedema

Question 3

Which of the following is NOT a mechanism that assists lymph transport through lymphatic vessels?

Accepted Answer

High-pressure arterial flow

Question 4

Which lymphatic structure is responsible for absorbing dietary fats from the intestine?

Accepted Answer

Lacteals

Question 5

A histological section shows rapidly dividing lymphocytes and thymic corpuscles. Which organ is being observed?

Accepted Answer

Thymus

Question 6

Which of the following best describes the difference between diffuse and follicular lymphoid tissue?

Accepted Answer

Diffuse tissue consists of loosely arranged lymphocytes, while follicular tissue forms spherical nodules.

Question 7

Which of the following is a secondary lymphoid organ where mature lymphocytes first encounter antigens?

Accepted Answer

Spleen

Question 8

A patient with cirrhosis develops an enlarged spleen. Which pathophysiological mechanism is most likely involved?

Accepted Answer

Congestive

Question 9

Which of the following equations best represents the relationship between lymph flow ($$Q$$), pressure gradient ($$\Delta P$$), and resistance ($$R) in $$the lymphatic system?

Accepted Answer

$$Q = \Delta P / R$$

Question 10

Which of the following is a function of the white pulp of the spleen?

Accepted Answer

Immune surveillance and lymphocyte proliferation

Question 11

Which of the following best describes the role of MALT in the immune system?

Accepted Answer

It provides immune protection in mucosal membranes.

Question 12

Which of the following is TRUE regarding the thymus?

Accepted Answer

It is most active during pre-adolescence.

Question 13

A patient presents with swollen, tender lymph nodes in the axilla after a flea bite. Which disease should be considered based on the lymphatic system’s clinical considerations?

Accepted Answer

Bubonic plague

Question 14

Which of the following is NOT a component of MALT?

Accepted Answer

Thymus

Question 15

Which cell type is primarily responsible for antigen presentation in lymphoid tissues?

Accepted Answer

Dendritic cells

Question 16

Which of the following best explains why lymphatic capillaries are highly permeable?

Accepted Answer

They have overlapping endothelial cells that function as one-way mini-valves.

Question 17

Which of the following is a correct sequence for lymph flow through a lymph node?

Accepted Answer

Afferent vessel → subcapsular sinus → medullary sinus → efferent vessel

Question 18

Which of the following best describes the function of the blood-thymus barrier?

Accepted Answer

It protects developing T cells from exposure to antigens in the blood.

Question 19

Which of the following is a unique feature of the spleen compared to lymph nodes?

Accepted Answer

It contains both white and red pulp.

Question 20

Which of the following best explains why removal of the spleen (splenectomy) increases susceptibility to infections?

Accepted Answer

The spleen is a major site for immune surveillance and removal of blood-borne pathogens.

The Lymphatic System: Structure, Function, and Clinical Considerations

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