Question 1

Which of the following best describes the primary function of the lymphatic system in relation to immunity?

Accepted Answer

It produces, maintains, and distributes lymphocytes and other immune cells to resist infection and disease.

Question 2

A patient has a blockage in their thoracic duct. Which region of the body would most likely experience impaired lymph drainage?

Accepted Answer

Left leg and left side of the abdomen

Question 3

Which of the following is a correct sequence for the movement of fluid through the lymphatic system?

Accepted Answer

Blood plasma → interstitial fluid → lymph

Question 4

Which lymphatic structure is responsible for the maturation of T lymphocytes?

Accepted Answer

Thymus

Question 5

A patient with a penicillin allergy experiences an immune response after taking the drug. This is best explained by which concept?

Accepted Answer

Penicillin acts as a hapten, binding to body proteins and forming a complex recognized as foreign.

Question 6

Which of the following is NOT a function of the spleen?

Accepted Answer

Maturation of T lymphocytes

Question 7

Which of the following best describes the role of the complement system in innate immunity?

Accepted Answer

It directly lyses pathogens, enhances phagocytosis, and promotes inflammation.

Question 8

A child receives a vaccine and later develops long-term immunity to the disease. Which type of immunity is this?

Accepted Answer

Artificially acquired active immunity

Question 9

Which of the following is a cardinal sign of inflammation?

Accepted Answer

Redness (erythema)

Question 10

Which cell type is primarily responsible for immune surveillance and the destruction of virus-infected or cancerous cells?

Accepted Answer

Natural killer (NK) cells

Question 11

Which of the following best explains why lymphatic capillaries are able to absorb interstitial fluid so efficiently?

Accepted Answer

Their endothelial cells overlap to form one-way valves.

Question 12

Which antibody class is most abundant in the blood and provides the majority of antibody-based immunity?

Accepted Answer

IgG

Question 13

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

Accepted Answer

Impaired immune response to blood-borne pathogens

Question 14

Which of the following is a property of adaptive immunity but NOT innate immunity?

Accepted Answer

Memory of previous exposures

Question 15

Which process describes the activation and rapid division of lymphocytes after encountering a specific antigen?

Accepted Answer

Clonal selection

Question 16

A patient with rheumatoid arthritis produces antibodies that attack their own tissues. This is an example of:

Accepted Answer

Autoimmune disorder

Question 17

Which of the following best describes the role of helper T cells in the immune response?

Accepted Answer

They activate B cells and other T cells by secreting cytokines.

Question 18

Which of the following is a correct statement about the complement activation pathways?

Accepted Answer

The classical pathway is triggered by antigen–antibody complexes.

Question 19

Which of the following is a function of interferons in the immune response?

Accepted Answer

They trigger the production of antiviral proteins and inhibit viral replication.

Question 20

A newborn receives antibodies from its mother through breast milk. This is an example of:

Accepted Answer

Naturally acquired passive immunity

Lymphatic System and Immunity: Structure, Function, and Defense Mechanisms

Study Guide - Practice Questions