BIOL-2230 Lecture 10: Immune System
7 Mar 2017
School
Department
Course
Professor
Document Summary
Immune system: prevents pathogens from getting into our body. If that fails, it tries to isolate and kill those things before it infects us: anything that"s foreign that gets in will be attacked (innate) Immune systems: nonspecific immune system, specific immune system, individual cells (lymphocytes) are specialized to attack certain things (adaptive, functional system. Superficial nonspecific defenses: skin, dead cells form a barrier, dry membrane. Superficial nonspecific defenses: skin, mucous membranes, physical barrier under skin, produces mucus that acts like a trap, secretes enzymes that digest things. Internal nonspecific defenses: phagocytes, macrophages, accumulated enzymes in vesicles, neutrophils, become phagocytic when they encounter something foreign, eosinophils, kill parasitic worms. Internal nonspecific defenses: phagocytes, macrophages, neutrophils, eosinophils, mast cells, mostly attack bacteria, have a bunch of receptors to bind to multiple bacteria. Internal nonspecific defenses: phagocytes, macrophages, neutrophils, eosinophils, mast cells, natural killer cells.
