Chapter 15 Immunity

Front

What is the second line of defense for innate immunity?

Back

Inflammation, Phagocytes (neutrophils, eosinophils, dendritic cells, macrophages), Fever, Antimicrobial substances.

Front

What are the physical functions of the first line of defense?

Back

Skin and epithelial linings, Skin (multiple layers of cells + keratin), Saliva, Mucous membranes.

Front

What are Defensins?

Back

Small cationic proteins that are attracted to negatively charged microbial cell surfaces.

Front

What do NK cells do?

Back

Kill infected cells.

Front

What is phagocytosis?

Back

Ingestion of microorganisms or particulate matter by phagocytes.

Front

What role do phagocytes play in the immune system?

Back

They engulf and digest pathogens and debris.

Front

What is the function of antibodies?

Back

To identify and neutralize foreign objects like bacteria and viruses.

Front

What is the complement system?

Back

A group of proteins that enhance the ability of antibodies and phagocytes to clear pathogens.

Front

What is the difference between innate and adaptive immunity?

Back

Innate immunity is the body's first line of defense, while adaptive immunity develops over time and provides a specific response to pathogens.

Front

What are the main types of lymphocytes involved in adaptive immunity?

Back

B cells and T cells.