BIOL 1202 : EXAM 2
Document Summary
Bacteria and archaea, all prokaryotes unicellular eukaryotes gene compared that make rrna. Animalia multicellular eukaryotes that ingest nutrients multicellular eukaryotes that use photosynthesis bacteria and archaea are no longer considered closely related broken into: Phylogeny and systematics: fossils show evolutionary relationships, all existing species come from preexisting species, 5 kingdom system until late 1900"s, 3 domain system is used today created by karl wouss. Bacteria (prokaryotic) separated into these domains by comparing their genes: linneas"s taxonomical system. Immune system: respiratory diseases are highly contagious, three lines of defense against microbial attack. "inner skin" cilia trap particles and mucus smoker"s cough is due to cilia being paralyzed and mucus getting into the lungs stomach - very acidic, protein digesting enzymes destroy microbes tears prevent microbial growth. 1) tissue damage carries bacteria into the wound. 2) wounded cells release chemicals that stimulate mast cells. Mast cells produce, store, and release histamine. 4) histamine increases capillary blood flow and permeability.
