18 Questions
What happens to the number of T cells after they are fully activated?
The number of T cells multiplies to expand
What is the role of regulatory T cells?
To slow and shut down the immune response
What is the basis of immune protection against disease?
Memory
What type of T cells can stay alive for months or years?
Memory T cells
What is the purpose of immune response in general?
To protect the body against disease
What is the primary function of the immune system?
To recognize and protect the organism against pathogens
Why don't we get infected with some diseases, such as measles or chicken pox, more than once?
Because of memory
What happens when the immune system is less active than normal?
Recurring and life-threatening infections occur
What is the study of immune systems in all organisms known as?
Immunology
What is the function of the innate immune system?
To recognize and protect the host from most microbes
What happens when the immune system malfunctions?
Autoimmune diseases and inflammatory diseases occur
What are the two categories of the immune system?
Innate and adaptive immune system
What type of antigens do invading germs carry?
Nonself-antigens
What is the primary function of cytokines released by immune cells?
To communicate with other immune cells
What happens to the skin when you skin your knee?
The first barrier is broken
What type of immune cells recognize and destroy invaders with a general attack?
Natural killer cells
What happens to dendritic cells when they engulf invaders and their nonself-antigens?
They mature into antigen-presenting cells
What is the primary goal of the immune response to an invader?
To defend the body against invasion
Learn about the immune system, a complex network of cellular actions and signals that defend an organism against pathogens. Explore the differences between innate and adaptive immunity in various organisms.
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