BIOL 1202 Chapter : The Immune System
Document Summary
Continuously shed, removing microbes that gain a foothold on skin. 43:1: in innate immunity, recognition and response rely on traits common to groups of pathogens. Mucus traps microbes entering the nose or mouth. Respiratory tract cilia sweep mucus and microbes away from lungs. Phagocytosis: ingestion of invading microorganisms by certain types of white blood cells. Proteins function by attacking microbes directly or by impeding reproduction. Complementary system: causes lysis of invading cells and helps trigger inflammation. Inflammatory response: chemical signals released by macrophages and mast cells(histamines) cause capillaries to become more permeable, fluid, antimicrobial proteins, and clotting elements enter site, cytokines attract more phagocytic cells, phagocytic cells engulf microbes and damaged cells. Attacks body cells that are virally infected or cancerous. Concept 43:2: in adaptive immunity, lymphocyte receptors provide pathogen specific recognition. Antigen: any foreign molecule that is specifically recognized by lymphocytes and elicits a response from them.
