~BN09 membrane potential

~BN09 membrane potential - Neural Signaling The Membrane...

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Neural Signaling: The Membrane Potential Lesson 9
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Membrane Structure Barrier Compartmentalization Semipermeable selectively leaky Fluid Mosaic Model Phospholipids Proteins ~
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Phospholipid Bilayer Hydrophilic heads (phosphate) Hydrophobic tails (lipid)
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Membrane Proteins Channels Pumps active transport Receptor protein sites bind messenger molecules Transducer proteins: 2d messenger systems Structural proteins form junctions with other neurons ~
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Membrane Proteins: Ionophores Ion Channels Non-gated always open Gated chemically-gated electrically-gated mechanically-gated ~
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Chemically-Gated Channels ligand-gated Ionotropic receptor protein = channel direct control ---> fast Metabotropic second messenger system indirect ---> slow ~
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Membrane Proteins OUTSIDE INSIDE
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Metabolic pumps: Active Transport Membrane proteins Pump ions require energy Na+ - K+ Ca++ (calcium) Also various molecules nutrients neurotransmitters ~
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This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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~BN09 membrane potential - Neural Signaling The Membrane...

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