Lecture outline 14
9/28/01 

Nerves and action potentials

• structure of the nerve cell
• electrical impulses as means of information transfer
• membrane voltage and potential
• ion concentrations inside and outside cells.

• simple diffusion
• facilitated diffusion
• channels
• carriers
• primary active transport - pumps
• secondary active transport
• carriers - cotransporters, exchangers.
• The pump-leak hypothesis for resting membrane potential and ion concentrations.