BIOL 2520 Lecture Notes - Lecture 1: Animalcule, House Mouse, Extremophile
24 Feb 2015
School
Department
Course
Professor
Document Summary
A self contained membrane-bound unit that carries out the functions of life. Knowledge of the parts will explain the whole. Can view the cell as a machine but many components are still unknown. Started with the development of microscopes by robert hooke: described cells in cork (empty and dead cells) Anton van leeuwenhoek: first to describe living cells. Theodor schwann (1839: all organisms are composed of one or more cells, cells are the structural unit of life. Rudolf virchow (1855: cells can arise only by division from pre-existing cells. Sem: take a large piece that is not a section, can see the topography of the surface, electron microscopes are still pretty clear even though you really zoom in (as opposed to light microscopes) o. Confocal scanning laser microscope: mostly used to localize proteins in the cell; proteins are tagged with fluorescents o.
