Question 1

Which of the following best distinguishes the third line of defense from the second line of defense in the human immune system?

Accepted Answer

It is highly specific and generates immunological memory against particular antigens.

Question 2

Which of the following statements accurately describes lymphocytes?

Accepted Answer

They are a type of white blood cell involved in adaptive immunity and can differentiate into memory cells.

Question 3

What does the acronym MALT stand for in immunology?

Accepted Answer

Mucosa-Associated Lymphoid Tissue

Question 4

You step on a nail in your backyard, resulting in a puncture wound that does not bleed freely. Where are antigens from any microbes that entered the wound most likely to end up first?

Accepted Answer

The nearest lymph node

Question 5

Which immunoglobulin is primarily associated with allergic reactions and defense against parasitic infections?

Accepted Answer

IgE

Question 6

Cell-mediated immunity is primarily a function of which type of cell?

Accepted Answer

T lymphocytes

Question 7

Which antibody class is the most prevalent in human blood serum?

Accepted Answer

IgG

Question 8

The lymphocytes of adaptive immunity that mature in the red bone marrow are called:

Accepted Answer

B cells

Question 9

What is the primary function of the thymus in the immune system?

Accepted Answer

It is the site where T lymphocytes mature.

Question 10

A person contracts chickenpox and recovers. What type of immunity is produced by the body in this scenario?

Accepted Answer

Naturally acquired active immunity

Question 11

Which of the following best describes the main function of the lymphatic system in immunity?

Accepted Answer

It transports immune cells and filters lymph to remove pathogens.

Question 12

What is the primary role of interleukins in the immune response?

Accepted Answer

They serve as signaling molecules that mediate communication between immune cells.

Question 13

Vaccination triggers an immune response which produces which type of immunity?

Accepted Answer

Artificially acquired active immunity

Question 14

Which of the following best describes IgE antibodies?

Accepted Answer

They are involved in allergic reactions and defense against parasitic worms.

Question 15

A patient receives an injection of antibodies after being exposed to rabies. Which type of immunity is this an example of?

Accepted Answer

Artificially acquired passive immunity

Question 16

Which immunoglobulin is most likely to be found in external secretions such as saliva, tears, and breast milk?

Accepted Answer

IgA

Question 17

A laboratory test detects high levels of IgM in a patient's serum. What does this most likely indicate?

Accepted Answer

The patient is experiencing a primary immune response to a recent infection.

Question 18

Which of the following equations best represents the process of antibody-antigen binding specificity?

Accepted Answer

$$Ag + Ab \rightarrow AgAb$$

Question 19

A child is born with antibodies against measles, mumps, and rubella, but has never been vaccinated or infected. Which immunoglobulin class is responsible for this, and how was it acquired?

Accepted Answer

IgG, acquired via placental transfer (naturally acquired passive immunity)

Question 20

Which of the following best explains why memory cells are important in adaptive immunity?

Accepted Answer

They allow for a faster and stronger immune response upon subsequent exposure to the same antigen.

Chapter 16 Immunology Review – Microbiology Study Guidance

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