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Immune System Overview

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Questions and Answers

What happens to the number of T cells after they are fully activated?

The number of T cells decreases

The number of T cells multiplies to expand (correct)

The number of T cells remains the same

The number of T cells is eliminated

What is the role of regulatory T cells?

To activate more T cells

To create memory T cells

To slow and shut down the immune response (correct)

To fight off invading cells

What is the basis of immune protection against disease?

Vaccination

Adaptive immunity

Innate immunity

Memory (correct)

What type of T cells can stay alive for months or years?

Memory T cells Signup and view all the answers

What is the purpose of immune response in general?

To protect the body against disease Signup and view all the answers

What is the primary function of the immune system?

To recognize and protect the organism against pathogens Signup and view all the answers

Why don't we get infected with some diseases, such as measles or chicken pox, more than once?

Because of memory Signup and view all the answers

What happens when the immune system is less active than normal?

Recurring and life-threatening infections occur Signup and view all the answers

What is the study of immune systems in all organisms known as?

Immunology Signup and view all the answers

What is the function of the innate immune system?

To recognize and protect the host from most microbes Signup and view all the answers

What happens when the immune system malfunctions?

Autoimmune diseases and inflammatory diseases occur Signup and view all the answers

What are the two categories of the immune system?

Innate and adaptive immune system Signup and view all the answers

What type of antigens do invading germs carry?

Nonself-antigens Signup and view all the answers

What is the primary function of cytokines released by immune cells?

To communicate with other immune cells Signup and view all the answers

What happens to the skin when you skin your knee?

The first barrier is broken Signup and view all the answers

What type of immune cells recognize and destroy invaders with a general attack?

Natural killer cells Signup and view all the answers

What happens to dendritic cells when they engulf invaders and their nonself-antigens?

They mature into antigen-presenting cells Signup and view all the answers

What is the primary goal of the immune response to an invader?

To defend the body against invasion Signup and view all the answers