Question 1

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

Accepted Answer

To produce, maintain, and distribute lymphocytes and other lymphoid cells

Question 2

Which of the following statements about lymphatic capillaries is CORRECT?

Accepted Answer

Their endothelial cells overlap to form one-way valves

Question 3

A patient has a blockage in the 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 4

Which of the following is a function of the spleen?

Accepted Answer

Initiation of immune responses by B cells and T cells in response to antigens in circulating blood

Question 5

Which class of antibody is most abundant in plasma and can cross the placenta to provide passive immunity to the fetus?

Accepted Answer

IgG

Question 6

A person receives an injection of antibodies against rabies after being bitten by a potentially rabid animal. This is an example of:

Accepted Answer

Artificially acquired passive immunity

Question 7

Which of the following best explains why inflammation is beneficial during an infection?

Accepted Answer

It increases blood flow, bringing more immune cells and nutrients to the area

Question 8

Which of the following is TRUE regarding the activation of cytotoxic T cells?

Accepted Answer

They require costimulation and antigen presentation by class I MHC proteins

Question 9

A patient with a penicillin allergy experiences a severe reaction after receiving the drug. This is most likely due to:

Accepted Answer

Penicillin acting as a hapten and binding to a carrier molecule, forming a complete antigen

Question 10

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

Accepted Answer

Memory

Question 11

Which of the following best describes the role of interferons in innate immunity?

Accepted Answer

They trigger the production of antiviral proteins that block viral replication

Question 12

Which of the following is the correct sequence for lymph flow through a lymph node?

Accepted Answer

Afferent lymphatic → subcapsular space → outer cortex → paracortex → medulla → efferent lymphatic

Question 13

Which of the following is a unique feature of lymphatic capillaries that allows them to absorb large molecules and pathogens?

Accepted Answer

Overlapping endothelial cells that act as one-way valves

Question 14

Which of the following is a function of regulatory T cells?

Accepted Answer

Limiting the immune response to a single stimulus by secreting suppression factors

Question 15

Which of the following best describes the process of opsonization?

Accepted Answer

The enhancement of phagocytosis by marking pathogens with antibodies or complement proteins

Question 16

A child develops immunity to chickenpox after recovering from the disease. This is an example of:

Accepted Answer

Naturally acquired active immunity

Question 17

Which of the following is a correct statement about the complement system?

Accepted Answer

It can be activated by three different pathways: classical, lectin, and alternative

Question 18

Which of the following is a cardinal sign of inflammation?

Accepted Answer

Redness

Question 19

Which of the following best explains why a secondary immune response is faster and more robust than a primary response?

Accepted Answer

Memory B cells are already primed to respond to the antigen

Question 20

Which of the following is TRUE regarding the role of helper T cells in the immune response?

Accepted Answer

They secrete cytokines that stimulate both cell-mediated and antibody-mediated immunity

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

Study Guide - Practice Questions