CAPS 390 Lecture Notes - Lecture 2: Lipid Bilayer, Phosphatidylcholine, Electron Microscope
18 Nov 2015
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Lecture 02 summary, sept 05/14 (dr. chris loewen) Cell biology i; readings: ch 2; pp 11-30. Cells are the basic fundamental units of structure and function in living organisms. Cells are surrounded by membranes and include various organelles (see fig 2. 5 and fig 2. 6 in the text). You should understand the basics of "cell theory" and what makes up a generalized cell (see dr. loewen"s slides 4 and 6). Membranes & phospholipids: the membrane is a lipid bilayer of phospholipids which are "amphipathic". Phosphatidylcholine is one of the major membrane phospholipids: Hydrophobic (water-repelling): the fatty acids: under an electron microscope (tem), cell membranes are "trilaminar" in appearance, even though they are actually a molecular "bilayer" (ie. 2 layers of phospholipids): *note that the image in the lecture notes and fig 2-7 in the textbook are showing the membranes of 2 adjacent cells.
