Question 1

Which of the following best describes the role of interferons in the innate immune response?

Accepted Answer

They stimulate the production of proteins that block viral reproduction in neighboring cells.

Question 2

A patient receives a booster shot for tetanus. Which type of immunity is being enhanced?

Accepted Answer

Artificially acquired active immunity

Question 3

Which of the following is a function of the complement system in immunity?

Accepted Answer

Forming a membrane attack complex (MAC) that causes cell lysis

Question 4

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

Accepted Answer

Naturally acquired passive immunity

Question 5

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

Accepted Answer

There are more memory cells specific to the antigen.

Question 6

Which antibody class is most abundant in plasma and is responsible for conferring passive immunity from mother to fetus?

Accepted Answer

IgG

Question 7

A patient with a genetic defect resulting in a lack of both B and T cells would most likely be diagnosed with:

Accepted Answer

Severe combined immunodeficiency (SCID)

Question 8

Which of the following is NOT a cardinal sign of acute inflammation?

Accepted Answer

Fever

Question 9

During phagocytosis, what is the role of opsonization?

Accepted Answer

To coat pathogens with antibodies or complement proteins, enhancing their recognition by phagocytes

Question 10

Which of the following best describes the function of regulatory T (TReg) cells?

Accepted Answer

They suppress immune responses to prevent autoimmunity.

Question 11

A person is exposed to poison ivy and develops a skin reaction 2 days later. This is an example of:

Accepted Answer

Delayed hypersensitivity (Type IV)

Question 12

Which of the following is true regarding the difference between Class I and Class II MHC proteins?

Accepted Answer

Class I MHC proteins present endogenous antigens to CD8 cells.

Question 13

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

Accepted Answer

It increases the metabolic rate, enhancing repair and immune cell production.

Question 14

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

Accepted Answer

Leukocytosis → Margination → Diapedesis → Chemotaxis

Question 15

Which of the following is a primary function of helper T (TH) cells?

Accepted Answer

Activating both B cells and cytotoxic T cells

Question 16

A patient receives an injection of antivenom after a snake bite. Which type of immunity is this?

Accepted Answer

Artificially acquired passive immunity

Question 17

Which of the following best describes the process of agglutination by antibodies?

Accepted Answer

Antibodies bind to cell-bound antigens, causing them to clump together.

Question 18

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

Accepted Answer

Memory of previous encounters with specific antigens

Question 19

A patient with type 1 diabetes mellitus has an immune system that destroys pancreatic beta cells. This is an example of:

Accepted Answer

Autoimmune disease

Question 20

Which of the following best explains the mechanism by which cytotoxic T (TC) cells kill infected cells?

Accepted Answer

They release perforin and granzymes to induce apoptosis in target cells.

Chapter 21: The Immune System – Innate and Adaptive Body Defenses

스터디 가이드 - 연습 문제