Learning Objectives >About Cell Biology Look briefly at the history of cell theory; Consider the basic properties of cells; >Compare some characteristics of two different classes of cells: >prokaryotes and eukaryotes; >Comprehend a special life:viruses Cell biology
1.About "Cell Biology” The NIH of USA(1988): What? "What is popular in research today? ◆3 kinds of diseases: ◇cancer cardiovascular diseases Forwhy? infectious diseases:AlDS,hepatitis ◆5 research fields: ◇cell cycle control: How to ◇cell apoptosis: ◇cellular senescence study? signal transduction; DNA damage and repair. What we know//How we know. Cell biology
ISI,USA(1997): SCI (Science Citation Index)Papers: Three tops of research fields: Nol:Signal transduction; No2:Cell apoptosis; No3:Genome and post-genomic analysis. Cell biology
2.The Cell Theory:A Brief History The discovery of cells followed from the invention of the microscope In 1665,Robert Hooke saw a network of tiny boxlike compartments that reminded him of a honeycomb.He called these little compartments“cellulae”,a Latin term meaning little room.It is from this word we get our present-day term,cell. The microscope used by Robert Hooke and the honeycomb-like network of "cell"he drawed in 1665 Cell biology
Cell theory has three basic tenets: 1.All organisms are composed of one or more cells. 2.The cell is basic unit of structure and function for all organisms. 3.All cells arise only from preexisting cells ☒19.sch1o1dcn(1804-1834) 4 20.Sehwann (1810-1852 by division. Cell biology