BIOL 1202 : Biology Exam 1 Notes
Document Summary
Other biological entities: not considered living organisms because they don"t hace all of the characteristics of living organisms, viruses: small (. 05-. 02 micrometers) and come in many different shapes, 3 common parts, genome= genetic information. Can be either single stranded or double stranded. Dna or rna: capsid= protein coat which surrounds and protects genome, envelope= membrane (phospholipid bilayer) which surrounds the capsid, hijack cells, highly specific for organism it infects, ex srna-hiv, ssrna-influenza virus, dsdna-varicella zoster virus. 8% of males used soap while washing hands. Innate defenses-nonspecific external barriers and nonspecific internal defenses: acquired immunity. Bio 1202 lecture 2: pathogen-disease causing agent, three lines of defense, external barriers (skin, mucous membranes, skin- physical barrier, inhospitable environment for growth; dry, dead cells at surface. Inflammatory response- caused by large-scale microbial invasion through wound: histamine released in response to damaged cell histamine increases blood flow to the area and washes out the wound. Tissue damage carries bacteria into wound: 2.
