BIOL 1410 Lecture Notes - Lecture 3: Tubulin, Intermediate Filament, Spindle Apparatus
16 Nov 2016
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Document Summary
Basic structural and functional unit of the body. Can perform all basic life functions: cell membrane (=plasma membrane = plasmalemma, phosphate head group (hydropihilic, fa tails (hydrophobic, divides icf + ecf, phospholipid bilayer. Extracellular fluid (cid:894)ecf(cid:895) = outside cell: cholesterol, scattered throughout membrane, adds stability to the cell membrane, membrane proteins. Within the membrane have a hydrophobic: integral proteins, peripheral proteins - attached to either surface region of region. Some extend across entire membrane = transmembrane proteins integral proteins: the cell, principal parts of the cell. Identity markers (for immune system: membrane carbohydrates. Bound to proteins (glycoproteins) or lipids (glycolipids) Functions: cell recognition e. g. egg and sperm, anchor cells together. Best seen on cells of small intestine and kidney. Fluid constituents can move around (phospholipids + some proteins) Mosaic proteins dot the surface like tiles in a mosaic. Contains water and a suspension of carbohydrates, proteins and lipids. May contain inclusions e. g. melanin (pigment), glycogen (stored glucose)
