Question 1

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

Accepted Answer

They absorb dietary fats from the intestine and return excess interstitial fluid to the bloodstream.

Question 2

A patient has a blockage in the right lymphatic duct. Which region of the body is most likely to experience lymphatic fluid accumulation (edema)?

Accepted Answer

Right upper arm

Question 3

Which of the following equations correctly represents the net filtration pressure ($$NFP) at $$the capillary bed, which determines the movement of fluid into the lymphatic system?

Accepted Answer

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

Question 4

Which lymphatic structure is responsible for draining lymph from the majority of the body, including both lower limbs and the left side of the thorax, arm, and head?

Accepted Answer

Thoracic duct

Question 5

Which of the following is NOT a function of lymph nodes?

Accepted Answer

Production of erythrocytes

Question 6

A patient has a genetic defect that prevents the formation of reticular fibers in lymphoid organs. Which of the following processes would be most directly impaired?

Accepted Answer

Structural support and scaffolding for immune cells

Question 7

Which of the following best describes the difference between primary and secondary lymphoid organs?

Accepted Answer

Primary lymphoid organs are where lymphocytes mature; secondary lymphoid organs are where they first encounter antigens.

Question 8

Which cell type is primarily responsible for producing antibodies in response to an infection?

Accepted Answer

Plasma cells (differentiated B lymphocytes)

Question 9

A patient has a surgical removal of the spleen (splenectomy). Which of the following consequences is most likely?

Accepted Answer

Reduced ability to filter blood-borne pathogens

Question 10

Which of the following best explains why lymph flows slowly through a lymph node?

Accepted Answer

There are fewer efferent vessels than afferent vessels.

Question 11

Which of the following is a major function of MALT (mucosa-associated lymphoid tissue)?

Accepted Answer

Protection of mucosal surfaces from pathogens

Question 12

Which of the following lymphoid organs is the site of T cell maturation?

Accepted Answer

Thymus

Question 13

Which of the following best describes the path of lymph flow from the tissues back to the heart?

Accepted Answer

Lymphatic capillaries → collecting lymphatic vessels → lymphatic trunks → lymphatic ducts → venous circulation

Question 14

Which of the following is a unique feature of lymphatic capillaries compared to blood capillaries?

Accepted Answer

They are more permeable due to overlapping endothelial cells that form one-way minivalves.

Question 15

Which of the following is a correct pairing of lymphatic trunk and the region it drains?

Accepted Answer

Bronchomediastinal trunk – thoracic organs

Question 16

Which of the following best explains why proteins that leak out of the blood capillaries must be returned to the blood via the lymphatic system?

Accepted Answer

Proteins are too large to be reabsorbed directly by blood capillaries.

Question 17

Which of the following is the main function of the germinal centers found in the cortex of lymph nodes?

Accepted Answer

Site of B cell proliferation and antibody production

Question 18

Which of the following best describes the role of macrophages in lymph nodes?

Accepted Answer

They phagocytose and destroy microorganisms and debris.

Question 19

Which of the following is a direct consequence if the lymphatic system fails to return excess interstitial fluid to the bloodstream?

Accepted Answer

Decreased blood volume

Question 20

Which of the following best explains why the presence of fewer efferent than afferent lymphatic vessels in a lymph node is advantageous for immune function?

Accepted Answer

It slows lymph flow, allowing more time for immune cells to filter and respond to pathogens.

The Lymphatic System: Structure, Function, and Immune Role

Guida di studio - Domande di pratica

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