PSYC 446 Lecture Notes - Lecture 6: Humoral Immunity, Multiple Sclerosis, Telomere
18 Sep 2018
School
Department
Course
Professor
Document Summary
Primary: the first time that b and t cells are exposed to a specific antigen, the respond takes weeks. Secondary: b and t memory cells respond immediately to destroy the invader. Immunity: the ability of the body to fight infection and/or foreign invaders by producing antibodies or killing infected cells. Immune system: the system in the body responsible for maintaining homeostasis by recognizing harmful from non-harmful organisms and produces an appropriate response. Foreign invaders: pathogens: viruses, bacteria, or other living thing that causes diseases/immune response, antigens: toxins that pathogens produces that cause harm to an organism. Immune system: not simply blood cells, collection of organs, vital for survival, blood: white blood cells in particular, lymph nodes, thymus gland produces t lymphocytes, bone marrow produces b lymphocytes. First line of defense: the skin, provides physical and chemical barriers, physical hard to penetrate, made of indigestible keratin, chemical tears, sweat.
