BIO 1140 Lecture Notes - Lecture 2: Scanning Electron Microscope, Desmosome, Cell Theory
6 Oct 2016
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Quizzes 5-6 multiple choice questions (20 mins top) Second one available next week (jan 21) Microscopy not covered in class (readings and labs only) Robert hook played with lens and built the first microscope. Microscope very different back then; reverse telescope (taking a small object and making it bigger) Cork was seen with a microscope for the first time. Looked like little compartments, called them cellulae (latin for small room) where the term cell comes from small rooms = cellulae = cells. Could only see the outer cell wall because the cells were dead; nothing on the inside. Over the course of 200 years; build our knowledge base to build the study of cell biology (to go from the dead cells cork to understanding how complex cells work) All organisms are composed of one or more cells. The cell is the basic structural and functional unit of all living organisms (schwann) Cell arise only from division of pre-exisiting cells (virchow)
