Question 1

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

Accepted Answer

They absorb and return excess interstitial fluid, including proteins, to the bloodstream.

Question 2

A patient presents with severe localized edema in the right arm following lymph node removal during cancer surgery. Which condition is most likely responsible for this symptom?

Accepted Answer

Lymphedema

Question 3

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

Accepted Answer

Contraction of cardiac muscle

Question 4

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

Accepted Answer

Lacteals

Question 5

A cancer cell escapes destruction in a lymph node and enters the bloodstream. Which feature of lymphatic capillaries makes this possible?

Accepted Answer

One-way minivalves formed by overlapping endothelial cells

Question 6

Which of the following is TRUE regarding the difference between primary and secondary lymphoid organs?

Accepted Answer

Primary lymphoid organs include the thymus and red bone marrow.

Question 7

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

Accepted Answer

There are fewer efferent vessels than afferent vessels.

Question 8

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

Accepted Answer

Life-threatening hemorrhage and shock

Question 9

Which of the following statements about the thymus is CORRECT?

Accepted Answer

It is most active during childhood and atrophies after puberty.

Question 10

Which of the following is a function of the spleen that distinguishes it from lymph nodes?

Accepted Answer

Cleanses blood of aged and defective red blood cells

Question 11

Which of the following best describes the role of dendritic cells in lymphoid tissues?

Accepted Answer

They capture antigens and present them to T cells for activation.

Question 12

Which of the following lymphoid tissues is most likely to become inflamed and swollen during a throat infection?

Accepted Answer

Palatine tonsils

Question 13

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

Accepted Answer

Its stroma is composed of epithelial cells rather than reticular fibers.

Question 14

A patient is diagnosed with lymphangitis. Which of the following best describes the underlying cause of this condition?

Accepted Answer

Inflammation of larger lymphatic vessels due to infection

Question 15

Which of the following best explains why the removal of the spleen (splenectomy) does not result in complete loss of immune function?

Accepted Answer

The liver and bone marrow take over most of the spleen’s functions.

Question 16

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

Accepted Answer

Prevention of pathogen entry through mucous membranes

Question 17

Which of the following best describes the structure of lymphoid follicles?

Accepted Answer

Solid, spherical bodies of tightly packed lymphoid cells and reticular fibers

Question 18

Which of the following is TRUE regarding the flow of lymph through the body?

Accepted Answer

Lymph from the left upper limb drains into the thoracic duct.

Question 19

Which of the following best explains the significance of the blood-thymus barrier?

Accepted Answer

It prevents premature activation of immature T lymphocytes by antigens.

Question 20

A patient with a bacterial infection develops swollen, tender lymph nodes. What is the most likely explanation for this finding?

Accepted Answer

The lymph nodes are overwhelmed by bacteria and filled with pus (buboes).

The Lymphatic System and Lymphoid Organs and Tissues – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards