[MIC4100] - Final Exam Guide - Ultimate 32 pages long Study Guide!

• School: University of Ottawa
• Department: Microbiology and Immunology
• Course: MIC 4100
• Professor: Nope

Document Summary

Ability of an organism to recognize and defend itself against pathogen. Resisting the attack of many dangerous organisms. Functions of the immune system to prevent or limits the infections by microorganisms. First line defence intact skin and mucous membrane. Second line defence- innate arm- available to destroy the invaders. Highly specific protection (3rd line of defence) known as adaptive immunity. It takes several days for this arm to become fully functional. Host defences that produce resistance against infection can be adaptive or innate. Innate defences: those that act against any type of invading agent. Adaptive defences: respond to particular agents called antigens (e. g. viruses and pathogenic bacteria) Respond to antigens by producing protein antibodies. Also involve the activation of the lymphocytes. Lymphocytes: specific (cid:272)ells of the (cid:271)od(cid:455)"s i(cid:373)(cid:373)u(cid:374)e s(cid:455)ste(cid:373) Antibody and cellular responses are more effective against succeeding invasions by same pathogen than against initial invasions.