Question 1

Which of the following is an example of an innate immune defense?

Accepted Answer

Phagocytosis by neutrophils

Question 2

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

Accepted Answer

Fever

Question 3

The two arms of adaptive immunity are:

Accepted Answer

Humoral and cell-mediated immunity

Question 4

Which cell type is responsible for presenting antigens to T cells?

Accepted Answer

Macrophages

Question 5

Which immunoglobulin class is most abundant in blood plasma?

Accepted Answer

IgG

Question 6

CD4+ T cells are primarily involved in which function?

Accepted Answer

Activating B cells and other immune cells

Question 7

Which of the following best describes the role of effector T cells?

Accepted Answer

They directly attack and destroy infected cells

Question 8

A patient with a deficiency in antigen-presenting cells would most likely have impaired:

Accepted Answer

Activation of T cells

Question 9

Which immunoglobulin is primarily responsible for allergic reactions?

Accepted Answer

IgE

Question 10

Which of the following processes is a function of the humoral arm of adaptive immunity?

Accepted Answer

Production of antibodies by B cells

Question 11

If a patient has a mutation that prevents the expression of CD8 on T cells, which immune function would be most affected?

Accepted Answer

Direct killing of virus-infected cells

Question 12

Which of the following is a key difference between innate and adaptive immunity?

Accepted Answer

Adaptive immunity has memory, while innate immunity does not

Question 13

Which immunoglobulin is the first to be produced in response to an infection?

Accepted Answer

IgM

Question 14

A patient presents with redness, heat, swelling, and pain at an injury site. Which process is most likely occurring?

Accepted Answer

Acute inflammation

Question 15

Which of the following best describes the function of antigen-presenting cells (APCs)?

Accepted Answer

They engulf pathogens and present their fragments to T cells

Question 16

Which class of immunoglobulin is found in secretions such as saliva and tears?

Accepted Answer

IgA

Question 17

Which of the following is a function of CD8+ T cells?

Accepted Answer

Directly killing infected or cancerous cells

Question 18

A patient with a deficiency in IgG would most likely experience problems with:

Accepted Answer

Long-term immunity against pathogens

Question 19

Which of the following is a multi-step process involving both innate and adaptive immunity?

Accepted Answer

Activation of T cells by antigen-presenting cells after pathogen invasion

Question 20

Which equation best represents the relationship between antibody concentration ($$[Ab]) $$and antigen binding sites ($$n) $$for a given immunoglobulin class?

Accepted Answer

$$[Ab] 	imes n = 	ext{Total binding sites}$$

Study Notes: The Immune System – Innate and Adaptive Defenses

Study Guide - Practice Questions

Study Guide - Flashcards