Question 1

Which of the following best distinguishes innate immunity from adaptive immunity?

Accepted Answer

Innate immunity provides a rapid, non-specific response, while adaptive immunity provides a slower, specific response.

Question 2

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

Accepted Answer

Rapid response to all pathogens

Question 3

Which cell type is primarily responsible for cell-mediated adaptive immunity?

Accepted Answer

T lymphocytes

Question 4

Which of the following best describes antibody-mediated (humoral) immunity?

Accepted Answer

It is mediated by B cells that produce antibodies targeting specific antigens.

Question 5

A patient receives an injection of antibodies against a toxin. This is an example of:

Accepted Answer

Passive immunity

Question 6

Which of the following scenarios best illustrates active immunity?

Accepted Answer

A person recovers from chickenpox and is protected from future infections.

Question 7

Which of the following statements about vaccines is correct?

Accepted Answer

Vaccines stimulate the adaptive immune system to produce memory cells.

Question 8

Why are vaccines considered vital for global health?

Accepted Answer

They reduce the spread of infectious diseases through herd immunity.

Question 9

Which of the following is a key difference between cell-mediated and antibody-mediated adaptive immunity?

Accepted Answer

Cell-mediated immunity targets infected cells, while antibody-mediated immunity targets pathogens in body fluids.

Question 10

A person who has never been exposed to a particular virus is vaccinated against it. What is the primary immune response that occurs?

Accepted Answer

Production of memory B and T cells specific to the virus

Question 11

Which of the following best explains why booster shots are sometimes required for vaccines?

Accepted Answer

To stimulate the immune system to maintain a high level of memory cells

Question 12

Which of the following is an example of passive immunity?

Accepted Answer

Receiving antibodies through a blood transfusion

Question 13

Which of the following is NOT a function of the adaptive immune system?

Accepted Answer

Immediate response to all pathogens

Question 14

Which of the following best describes the mechanism of action of a vaccine?

Accepted Answer

It introduces a harmless form of an antigen to stimulate an immune response.

Question 15

Which of the following is a real-world example of adaptive immunity in action?

Accepted Answer

A person does not get sick after being exposed to the flu virus because they were vaccinated the previous year.

Innate and Adaptive Immunity: Key Concepts and Applications

Study Guide - Practice Questions