PBS Unit 3.1 Review

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What is innate immunity?

Back

Innate immunity refers to the body's first line of defense against pathogens, which includes physical barriers (like skin), chemical barriers (like enzymes), and immune cells (like phagocytes).

Front

What are phagocytes?

Back

Phagocytes are a type of immune cell that engulf and digest pathogens and debris in the body.

Front

What role do cilia play in the immune system?

Back

Cilia are small hair-like structures that trap pathogens and help move them out of the respiratory tract.

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What are helminths?

Back

Helminths are parasitic worms that can cause infections in humans and animals.

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What is acquired immunity?

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Acquired immunity is the immunity that develops after exposure to a specific pathogen, involving B cells, T cells, and antibodies.

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What are B cells?

Back

B cells are a type of white blood cell that produce antibodies to help fight infections.

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What are T cells?

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T cells are a type of white blood cell that play a central role in cell-mediated immunity, helping to destroy infected cells.

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What are antibodies?

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Antibodies are proteins produced by B cells that specifically target and neutralize pathogens.

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What is an outbreak?

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An outbreak is a sudden increase in the occurrence of a disease in a specific area.

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What is the difference between an outbreak and a pandemic?

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An outbreak is localized, while a pandemic is a global spread of a disease.