BSC 108 Lecture Notes - Lecture 7: Golgi Apparatus, Nucleolus, Endoplasmic Reticulum
Document Summary
Microscopes as windows on the world of cells. Light microscopes (lm: can be used to explore structures and function of cells, when scientists examine a specimen on a microscopes slide. Lenses enlarge or magnify, the image: have difference magnification and resolving power, resolving power: The ability of an optical instrument to show two objects as separate: magnification: An increase in the specimen"s image: may be used by many scientists. The electron microscope (em: uses a beam of selections, results in better resolving than the light microscope, two kinds of electrons microscopes reveal different parts. Are useful for internal details of cells. All livings things are composed of cells. Plasma membrane: phospholipid bilayer, selective barrier, separates the living cell from its nonliving surroundings. Cytosol or cytoplasm: the area within the membrane not including the organelles. The two major categories of cells are: prokaryotes and eukaryotes.