BIOL 1010U Lecture Notes - Lecture 7: Active Transport, Phospholipid, Facilitated Diffusion
5 May 2016
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Document Summary
Biol 1010 and biol 1011 - lecture 7. Use the following wireframe outline to make notes on the content presented in lecture 7. Major lipids found in cell membranes are (1) phospholipids: hydrophilic region has polar" head (glycerol, phosphate and a polar group, hydrophobic region has 2 fatty acid tails. Hydrophobic property allows phospholipids to arrange themselves spontaneously. A molecule that has a hydrophilic (water loving) and hydrophobic (water hating) part. Crucial for function: due to lipids. Type of hydrocarbon tails in phospholipids (unsaturated vs saturated) Lipids and proteins coexist in membrane forming a mosaic . Molecules move laterally in membrane so membrane is fluid . Integral protein: include transmembrane proteins that span the entire protein. Peripheral protein: are temporarily associated with either the internal or external side of the membrane. Both lipids and proteins play an important role in controlling the movement of materials into and out of cells. Responsible for selective permeability (1) passive transport no energy input.
