3.1 cell membrane notes

3.1 cell membrane notes - -1- CELL MEMBRANE Functions -...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
- 1 - CELL MEMBRANE Functions - separates the living cell from its nonliving surroundings - controls traffic into and out of the cell; it is semi-permeable/selectively permeable/differentially permeable Its structure is related to its function. It is a structural mosaic as well as a functional one. Structure - the current model is the “fluid mosaic model” fluid – because of the unsaturated hydrocarbon chains in the bilayer of phospholipids mosaic – because of the mosaic of protein molecules bobbing between lipids and carbohydrates Model of a Cell Membrane carbohydrate (oligosaccharide) phosphate group and glycerol fatty acid cholesterol transmembrane protein extrinsic protein phospholipid (integral or intrinsic)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
- 2 - Phospholipids - main composition component - an amphipathic molecule meaning it has both a hydrophilic region and a hydrophobic region -- thus forms a bilipid layer Cholesterol - helps control fluidity by reducing movement of phospholipids at room temperatures, but also hinders solidification at low temperatures
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/06/2009 for the course BIO BLG143 taught by Professor Kimberleygilbride during the Spring '09 term at Ryerson.

Page1 / 5

3.1 cell membrane notes - -1- CELL MEMBRANE Functions -...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online