Psychology 2036A/B Lecture Notes - Lecture 14: Cytotoxic T Cell, Natural Killer Cell, B Cell

• School: Western University
• Department: Psychology
• Course: Psychology 2036A/B
• Professor: Doug Hazlewood

Document Summary

Our bodies are constantly being assaulted by foreign threats: viruses, molds, fungi, pollen, bacteria, etc. But for most of the time we stay healthy. Part 1 : what is the immune system: a complex biological system that detects and destroys threats to the body, types of immunity: Innate immunity: born with this. e. g. , fever when infected. Natural immunity: acquired from previous experience with illness. e. g. , measels. Artificial immunity: acquired from vaccinations. e. g. , for polio, smallpox, etc: types of threats: Foreign substances that have invaded the body (e. g. , viruses, bacteria)=>called. Cells that are not behaving normally. (e. g. , cancerous cells; cells that have become infected by foreign invaders) Part 2: the immune system"s response to threats that have entered the body(nonspecific& specific: nonspecific immunity (immune system attacks anything that looks unusual). Phagocytes(scavengers that engulf and digest antigens in blood/body fluid before they infect cells)