Question 1

Which of the following best describes the primary function of the lymphatic system?

Accepted Answer

To return interstitial fluid and leaked plasma proteins back to the blood

Question 2

Which structure is responsible for absorbing digested fats and delivering fatty lymph (chyle) to the blood?

Accepted Answer

Lacteals

Question 3

A patient presents with severe localized edema after cancer surgery. Which condition is most likely responsible?

Accepted Answer

Lymphedema

Question 4

Which of the following mechanisms does NOT contribute to lymph transport in the lymphatic system?

Accepted Answer

High-pressure arterial flow

Question 5

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

Accepted Answer

Right lymphatic duct

Question 6

Which cell type is responsible for producing antibodies in the lymphatic system?

Accepted Answer

Plasma cells

Question 7

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 8

What is the main function of lymph nodes?

Accepted Answer

To filter lymph and activate the immune response

Question 9

Which of the following statements about the spleen is TRUE?

Accepted Answer

It stores breakdown products of RBCs for reuse

Question 10

Which of the following best explains why lymphatic capillaries are more permeable than blood capillaries?

Accepted Answer

Endothelial cells overlap loosely to form one-way minivalves

Question 11

A patient with a ruptured spleen is at risk for which of the following complications?

Accepted Answer

Hemorrhage and shock due to blood loss

Question 12

Which of the following is NOT a function of the mucosa-associated lymphoid tissue (MALT)?

Accepted Answer

Produces red blood cells

Question 13

Which of the following is TRUE regarding the thymus?

Accepted Answer

It functions strictly in T lymphocyte maturation

Question 14

Which of the following best describes the flow of lymph through a lymph node?

Accepted Answer

Lymph enters via afferent vessels, passes through cortex and medulla, and exits via efferent vessels

Question 15

Which equation best represents the volume of interstitial fluid circulated by the lymphatic system per day?

Accepted Answer

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

Question 16

Which of the following is a risk associated with the tonsillar crypts in the tonsils?

Accepted Answer

They allow bacteria to enter tissues, which can activate immune cells and build memory

Question 17

Which of the following cells is most responsible for phagocytizing foreign substances and activating T cells in lymphoid tissue?

Accepted Answer

Macrophages

Question 18

Which of the following is TRUE about lymphoid follicles?

Accepted Answer

They contain germinal centers of proliferating B cells

Question 19

Which of the following best explains why lymph flow through nodes is slow and allows time for immune function?

Accepted Answer

There are fewer efferent than afferent lymphatic vessels

Question 20

Which of the following is a function of Peyer's patches and the appendix in the lymphatic system?

Accepted Answer

They destroy bacteria and generate memory lymphocytes

The Lymphatic System and Lymphoid Organs: Structure and Function

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