BIOL273 Lecture Notes - Lecture 6: Immunodeficiency, Protozoa
28 Apr 2020
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Document Summary
Big multicellular organisms provide lots of environments for other, smaller organisms to proliferate in. Ability of the body to fight off these invaders is called immunity (immunis = exempt) Protecting the body: microbes = bacteria, viruses, fungi, protozoa, parasites = worms, etc, toxins produced by microbes, other foreign proteins/substances, removes dead/damaged tissue and cells. Immune cells scavenge extracellular compartments: tries to recognize and remove abnormal cells, cells that are unable to control growth may be detected the immune system, diseases of the immune system. When it does not perform normally, you get a variety of pathologies. Examples: incorrect responses; autoimmunity, overactive responses; allergies, lack of response; immunodeficiency. They all require slightly different responses: parasites. Causes chronic illness, nutritional deficiencies, death: bacteria. Cells surround by a cell membrane & usually a cell wall. Most can be killed by drugs antibiotics: viruses. Not cells nucleic acid core with protein coat cannot reproduce alone. Some have envelope derived from host cell membrane.
