Question 1

Which of the following best describes the primary function of lymph nodes in the lymphatic system?

Accepted Answer

They filter and purify lymph before it returns to the venous circulation.

Question 2

A patient presents with swollen lymph nodes in the neck. Which of the following is the most likely explanation for this finding?

Accepted Answer

The lymph nodes are actively filtering pathogens from lymph draining from the head and neck.

Question 3

Which of the following cells is responsible for immunological surveillance and the destruction of abnormal cells?

Accepted Answer

Natural killer (NK) cells

Question 4

Which structure is responsible for returning lymph from the lower limbs and abdomen to the venous system?

Accepted Answer

Cisterna chyli

Question 5

Which of the following best describes the role of the spleen in the lymphatic system?

Accepted Answer

It removes abnormal blood cells and initiates immune responses to blood-borne antigens.

Question 6

Which of the following is a property of specific immunity?

Accepted Answer

It has memory, allowing for a faster response upon re-exposure to the same antigen.

Question 7

A child receives antibodies from their mother through breast milk. This is an example of which type of immunity?

Accepted Answer

Naturally acquired passive immunity

Question 8

Which of the following best explains the mechanism of action of interferons?

Accepted Answer

They trigger the production of antiviral proteins in neighboring cells.

Question 9

Which of the following is a correct sequence of events in the inflammatory response?

Accepted Answer

Tissue damage → chemical change in interstitial fluid → mast cell activation → increased blood flow

Question 10

Which of the following best describes the classical pathway of complement activation?

Accepted Answer

It is triggered by the binding of antibodies to antigens.

Question 11

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

Accepted Answer

Regulation of blood glucose levels

Question 12

Which of the following statements about lymphatic capillaries is TRUE?

Accepted Answer

They have closed ends and allow the entry of large molecules and cells.

Question 13

A patient with a genetic defect that prevents the production of perforins would have impaired function of which immune cells?

Accepted Answer

Natural killer (NK) cells

Question 14

Which of the following best describes the difference between innate and acquired immunity?

Accepted Answer

Innate immunity is present at birth, while acquired immunity develops after exposure to antigens.

Question 15

Which of the following is a characteristic of an autoimmune disorder?

Accepted Answer

The immune system mistakenly targets and attacks normal body cells.

Question 16

Which of the following best explains why fever can be beneficial during infection?

Accepted Answer

Fever increases the rate of chemical reactions and inhibits the growth of some pathogens.

Question 17

Which of the following is a function of the thymus in the lymphatic system?

Accepted Answer

It is the site of T cell maturation and the production of thymic hormones.

Question 18

Which of the following best describes the role of MALT (mucosa-associated lymphoid tissue)?

Accepted Answer

It is a collection of lymphoid tissues that protect the digestive system from pathogens.

Question 19

Which of the following is a correct statement about the movement of lymph through lymphatic vessels?

Accepted Answer

Lymph movement is aided by skeletal muscle contraction and the presence of one-way valves.

Question 20

Which of the following best describes the process of diapedesis?

Accepted Answer

The passage of phagocytes through capillary walls to reach infected tissues.

The Lymphatic System and Body Defenses: Structure, Function, and Immunity

Study Guide - Practice Questions