Unformatted text preview: Membrane Structure Membrane Structure and Function Membrane Fluidity Membrane Fluidity Animal – saturated fatty acids, cholesterol Plant – unsaturated fatty acids Membrane Proteins Membrane Proteins Recognition proteins Receptor proteins Transport proteins Carrier Channel: open, gated Membrane Transport
How?? Why?? Which way?? Membrane Transport Membrane Transport
1) Passive Transport no energy required from high concentration to low concentration Passive Transport Passive Transport Simple Diffusion small or nonpolar example: O , CO 2 2 Facilitated Diffusion large or ions example: Na+, glucose Comparing Solute Comparing Solute Concentration Hypertonic = higher concentration of solutes Hypotonic = lower concentration of solutes Isotonic = same concentration of solutes Passive Transport Passive Transport Osmosis the diffusion of water across a selectively permeable membrane down a concentration gradient Water ALWAYS moves from hypotonic to h...
View Full Document