Question 1

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

Accepted Answer

To return leaked fluids from blood vessels back to the blood and provide the anatomical basis for immune defenses

Question 2

Which lymphoid organ is the primary site for T cell maturation?

Accepted Answer

Thymus

Question 3

A patient has a genetic defect that prevents the formation of the complement protein C3. Which of the following immune processes would be most directly impaired?

Accepted Answer

Cell lysis via the membrane attack complex

Question 4

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

Accepted Answer

Site of T cell maturation

Question 5

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

Accepted Answer

Innate immunity is always present and responds to all pathogens in the same way, while adaptive immunity targets specific pathogens and improves with exposure

Question 6

Which of the following is a cardinal sign of acute inflammation?

Accepted Answer

Redness

Question 7

A child receives a vaccine containing an inactivated virus. Which type of immunity is being induced?

Accepted Answer

Artificially acquired active immunity

Question 8

Which of the following is a function of antibodies in humoral immunity?

Accepted Answer

Neutralizing toxins and viruses by binding to them

Question 9

Which pathway of complement activation is triggered by antibodies binding to antigens?

Accepted Answer

Classical pathway

Question 10

A patient with a deficiency in natural killer (NK) cells would be most susceptible to which of the following?

Accepted Answer

Viral infections and cancerous cell growth

Question 11

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

Accepted Answer

It causes the liver and spleen to sequester iron and zinc, which are needed by microorganisms

Question 12

Which of the following is a correct sequence of events in phagocyte mobilization during inflammation?

Accepted Answer

Leukocytosis → Margination → Diapedesis → Chemotaxis

Question 13

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 14

Which of the following best describes the role of antigen-presenting cells (APCs) in adaptive immunity?

Accepted Answer

They present processed antigens on MHC molecules to T cells, initiating adaptive immune responses

Question 15

Which of the following is a function of the lymph nodes?

Accepted Answer

Cleansing lymph and site for lymphocyte activation and proliferation

Question 16

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

Accepted Answer

Memory for previously encountered antigens

Question 17

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

Accepted Answer

Naturally acquired passive immunity

Question 18

Which of the following best describes the process of opsonization?

Accepted Answer

The coating of pathogens by antibodies or complement proteins to enhance phagocytosis

Question 19

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

Accepted Answer

Prevention of pathogen entry across mucosal surfaces

Question 20

Which of the following best explains why chronic inflammation can contribute to diseases such as cancer and cardiovascular disease?

Accepted Answer

Persistent inflammatory signals can cause tissue damage, promote abnormal cell growth, and disrupt normal tissue repair

Lymphatic System and Immune System: Structure and Function Study Guide

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