Question 1

Which of the following best describes the primary function of lymph nodes in the immune system?

Accepted Answer

They filter lymph and provide sites for immune cell activation and proliferation.

Question 2

Which organ is responsible for the maturation of T lymphocytes, and what is the process called?

Accepted Answer

Thymus; clonal selection

Question 3

What is the main difference between specific and non-specific defenses in the immune system?

Accepted Answer

Specific defenses recognize and remember particular pathogens, while non-specific defenses act as general barriers.

Question 4

Which of the following is an example of a physical barrier defense?

Accepted Answer

Skin

Question 5

Lysozyme is an enzyme found in tears and saliva. What is its primary function?

Accepted Answer

It breaks down bacterial cell walls, providing a chemical defense.

Question 6

Which of the following best describes the process of clonal selection?

Accepted Answer

The activation and proliferation of lymphocytes that recognize a specific antigen.

Question 7

Memory B cells play a crucial role in immunity by:

Accepted Answer

Remembering specific antigens and enabling a faster response upon re-exposure.

Question 8

Which equation best represents the relationship between antigen concentration ($$[Ag]) $$and antibody production ($$[Ab]) in a $$primary immune response?

Accepted Answer

$$[Ab] = k 	imes [Ag]$$

Question 9

Which of the following is NOT a function of the complement system?

Accepted Answer

Stimulating antibody production

Question 10

A patient is exposed to a virus for the first time. Which immune cells are primarily responsible for the initial non-specific response?

Accepted Answer

Phagocytes such as neutrophils and macrophages

Question 11

Which of the following best explains why specific immune responses persist after an infection?

Accepted Answer

Memory cells are formed that can quickly respond to future exposures.

Question 12

Which of the following is a chemical barrier defense?

Accepted Answer

Lysozyme in saliva

Question 13

Which statement about inflammation is correct?

Accepted Answer

It is a non-specific response that increases blood flow and recruits immune cells to the site of infection.

Question 14

Which of the following is NOT considered a lymph organ?

Accepted Answer

Liver

Question 15

Which process allows the immune system to distinguish between self and non-self antigens?

Accepted Answer

Specificity

Question 16

During a secondary immune response, which cells are activated most rapidly?

Accepted Answer

Memory B cells

Question 17

Which of the following is a unique feature of specific defenses compared to non-specific defenses?

Accepted Answer

Ability to remember and respond more efficiently to previously encountered pathogens

Question 18

Which of the following best describes the role of antigens in the immune response?

Accepted Answer

They are molecules recognized by immune cells as foreign, triggering a response.

Question 19

Which equation represents the rate of antibody production ($$R_{Ab}) as a $$function of antigen concentration ($$[Ag]) $$and activation constant ($$k$$)?

Accepted Answer

$$R_{Ab} = k 	imes [Ag]$$

Question 20

Which of the following is a function of the spleen in the immune system?

Accepted Answer

It filters blood and removes old or damaged red blood cells.

The Lymphatic and Immune Systems: Structure, Function, and Defense Mechanisms

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