Cell Biology

Cell Biology

1. Action Potential

   • Membrane Potential
     • Net charge: -60mV
   • Voltage-gated channels
     • Opens when membrane potential changes
     • Local Anetsthesia
       • Blocks voltage-gated sodium channels
       • Easily diffusable through membranes
       • Lidocane
   • Saltatory conductions
     • Hops along myelin shealth, travels in nodes
   • Depolarization cyc
     • Pressure causes depolarization event

2. Homeo

   • Osmotic pressues
   • Diffusion
     • Active
     • Passive
     • Facilitated :)

3. Junctions

   • Tight
     • Anyphylaxis and lethal when punctured
   • Gap- allows easier travel of depolarization and ions
   • Demosomes- protien holing togeth