Question 1

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

Accepted Answer

To return fluids leaked from blood vessels back to the blood and provide the structural basis of the immune system

Question 2

A patient has a tumor blocking the thoracic duct. Which of the following is the most likely consequence?

Accepted Answer

Accumulation of lymph in tissues leading to lymphedema

Question 3

Which of the following statements about lymphatic capillaries is TRUE?

Accepted Answer

They are blind-ended vessels that are more permeable than blood capillaries

Question 4

In the small intestine, specialized lymphatic capillaries called lacteals are responsible for:

Accepted Answer

Absorbing and transporting digested fats as chyle

Question 5

Which mechanism does NOT contribute to the movement of lymph through lymphatic vessels?

Accepted Answer

High-pressure pumping from the heart

Question 6

A patient presents with severe localized swelling after lymph node removal during cancer surgery. What is the most likely diagnosis?

Accepted Answer

Lymphedema

Question 7

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 8

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

Accepted Answer

Plasma cells

Question 9

Which of the following best explains why lymph flow is slow through lymph nodes?

Accepted Answer

To allow time for lymphocytes and macrophages to function

Question 10

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

Accepted Answer

Impaired removal of old red blood cells and bloodborne pathogens

Question 11

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

Accepted Answer

Immune surveillance and response

Question 12

Which of the following is NOT a characteristic of the thymus?

Accepted Answer

It contains lymphoid follicles with germinal centers

Question 13

Which of the following best describes the role of tonsillar crypts?

Accepted Answer

They trap debris and bacteria to help build immune memory

Question 14

Which of the following is TRUE regarding lymphoid follicles?

Accepted Answer

They contain germinal centers of proliferating B cells

Question 15

A patient with cancer has swollen, non-painful lymph nodes. What is the most likely explanation?

Accepted Answer

The nodes are secondary cancer sites due to metastasis

Question 16

Which of the following equations best represents the net filtration pressure (NFP) that drives fluid out of capillaries into the interstitial space?

Accepted Answer

$$NFP = (HP_c - HP_i) - (OP_c - OP_i)$$

Question 17

Which of the following is a major difference between primary and secondary lymphoid organs?

Accepted Answer

Primary lymphoid organs are where lymphocytes mature; secondary lymphoid organs are where lymphocytes encounter antigens and become activated

Question 18

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

Accepted Answer

Producing erythrocytes for oxygen transport

Question 19

Which of the following best explains why immobilizing a badly infected body part can help restrict the spread of infection?

Accepted Answer

It restricts the outflow of inflammatory materials by reducing lymph flow

Question 20

Which of the following is a unique feature of the thymus compared to other lymphoid organs?

Accepted Answer

It has no follicles and does not directly fight antigens

The Lymphatic System: Structure, Function, and Lymphoid Organs

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