CH. 23 Immune System Flashcards
What would the physical barriers of the body consist of?
skin:
- epidermis
- dermis (sebaceous glands)
mucous membranes: viscous mucus traps foreign matter
What is the most abundant phagocyte?
neutrophils
What are the four different classes of pathogens?
- viruses
- bacteria
- fungi
- parasites
What are the 7 different nonspecific defenses?
- pathogen-associated molecular patterns (PAMPs)
- pattern recognition receptors: bind PAMPs
- physical barriers
- inflammation
- interferons
- natural killer cells
- complement system
What triggers the secretion of cytokines by phagocytes?
attachment of foreign particle to phagocyte
What are interferons?
proteins secreted by leukocytes and virus-infected cells
What two T lymphocytes aid in cell mediated immunity?
helper T cells
cytotoxic T cells
What is released when someone is allergic and what antibodies and antigens are involved?
released: histamine
antibodies: lgE
antigens: allergens
What is released when someone is allergic and what antibodies and antigens are involved?
released: histamine
antibodies: lgE
antigens: allergens
