ANAT 262 Lecture Notes - Lecture 5: Nuclear Membrane, Electron Scattering, Intermembrane Space
15 Jul 2016
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Document Summary
A cell consists of a membrane (eukaryotes have a pm). Inside the cell, there is different types of organelles: nucleus, er, mitochondria, vesicles such as lysosomes , cytoskeleton elements (microtubules and actin filaments). We have been able to see these structures using em. Organization depends mostly on the function of the cell (e. g. if a cell contains lots of vesicles, this cell probably has a main role in secretion) Seeing has allowed us to understand what is the cell and provided clues on what it does. Recall: 1mm = 1000 um = 1000000 nm = 10000000 a. Electron microscopy allows us to see much smaller things that can be seen with the naked eye (up to 2 mm) From ancient times, man has wanted to see things far smaller than could be perceived with the naked eye. Use of glass to magnify things dates at least to the romans with the invention of glass in the first century.
