Question 1

Which of the following best describes the difference between lymph and lymphocytes, as illustrated in the first image?

Accepted Answer

Lymphocytes are the main cells of the lymphatic system, while lymph is the interstitial fluid that has entered a lymphatic vessel.

Question 2

Based on the second image, which of the following is NOT a primary lymphoid organ?

Accepted Answer

Spleen

Question 3

Referencing the third image, which lymphoid organ is responsible for filtering blood and initiating immune responses to antigens in the bloodstream?

Accepted Answer

Spleen

Question 4

In the fourth image, what is the primary function of lymphatic capillaries in relation to blood capillaries?

Accepted Answer

Lymphatic capillaries collect excess interstitial fluid and return it to the blood.

Question 5

According to the fifth image, what structural feature of lymphatic capillaries allows the entry of fluid, solutes, and pathogens?

Accepted Answer

Overlapping endothelial cells acting as one-way valves

Question 6

Based on the sixth image, what prevents the backflow of lymph in lymphatic vessels?

Accepted Answer

Lymphatic valves

Question 7

In the seventh image, which area would lack lymphatic vessels due to absence of blood supply?

Accepted Answer

Cornea of the eye

Question 8

Referring to the eighth image, which side of the body does the thoracic duct drain?

Accepted Answer

Left side above the diaphragm and everything below the diaphragm

Question 9

According to the ninth image, what is the function of the cisterna chyli?

Accepted Answer

It receives lymph from lumbar and intestinal trunks and serves as the base of the thoracic duct.

Question 10

Based on the tenth image, what would be the consequence of a blocked lymphatic drainage?

Accepted Answer

Lymphedema, characterized by swelling and accumulation of interstitial fluid

Question 11

Referencing the eleventh image, which class of lymphocytes is primarily responsible for immune surveillance?

Accepted Answer

NK cells

Question 12

According to the twelfth image, where is the thymus gland located?

Accepted Answer

Directly behind the sternum and between the lungs

Question 13

Based on the thirteenth image, which tissue is primarily responsible for the production of lymphoid stem cells?

Accepted Answer

Red bone marrow

Question 14

Referring to the fourteenth image, what is the function of aggregated lymphoid nodules (Peyer's patches) in the intestines?

Accepted Answer

They protect the intestinal lining from pathogens and toxins.

Question 15

According to the fifteenth image, which tonsil is located at the upper back wall of the nasopharynx?

Accepted Answer

Pharyngeal tonsil (adenoid)

Question 16

Based on the sixteenth image, what is the correct path of lymph through a lymph node?

Accepted Answer

Afferent lymphatics → Subcapsular space → Outer cortex → Paracortex → Medullary sinus → Efferent lymphatics

The Lymphatic System and Immunity: Structure, Function, and Clinical Relevance

Study Guide - Practice Questions