BIOLOGY 1P03 Lecture Notes - Lecture 5: Lipid Bilayer, Fluid Mosaic Model, Membrane Fluidity
13 Dec 2013
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Document Summary
Membranes separate living entities from nonliving entities allow cell"s internal contents to be different from the external environment chemical reactions are more efficient since greater collisions between. 5-1 the plasma membrane serves as a boundary (separation of internal and external things) selective barrier increases reaction efficiency. What are the nonpolar regions: hydrophobic fatty acid tails (water fearing) E5 2 caribou legs adapted to cold. Fig 5-6 types of diffusion through plasma membrane* Fig 5-7 effect of solute concentration on osmosis* (compare solutions)(table) (plant vs. Hypotonic lower solute concentration than that in the cell. Hypertonic greater solute concentration than that in the cell. Isotonic equal solute concentration compared to that in the cell. Hypotonic solution move to area of great concentration plant cells become turgid (plump up cell; not going to burst) Isotonic solution plant cell become flaccid in and out of cell wall. Hypertonic solution plant cell becomes playsmolyzed pulling away from the cell wall.
