BIOL 102 Study Guide - Midterm Guide: Natural Killer Cell, Dendritic Cell, Complement System
Document Summary
Immune cells produce receptor molecules that bind to foreign objects. All animals have innate immunity, a defense that is acive immediately upon infecion. The capacity to generate diversity is built into the structure of immunoglobulin (ig) genes. Innate immunity: present before pathogen exposure acive at ime of birth, involves nonspeciic responses to pathogens, first response-foundaion for adapive immunity, innate defenses include (shared with invertebrates) Barrier defenses- skin, mucus, urinary and reproducive tracts. Animicrobial pepides: innate defenses unique to vertebrates. Adapive immunity, or acquired immunity: develops ater exposure to agents such as microbes, toxins, or other foreign substances, takes ime slower response, it involves a very speciic response to pathogens. Phagocytosis: pathogens are recognized by trls, 4 types of phagocyic cells. Neutrophils circulate in the blood and are atracted by signals from infected issues. Dendriic cells simulate development of adapive immunity in cells that contact the environment (such as skin)
