Kenyon College -- Department of Biology
Biology 113 
Fall 2001 

Lecture outline 15
10/01/01 

Membrane transport

  • 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.
The equilibrium potential.

Transport during action potential.

  • Propagation of the action potential
  • Saltatory propagation in myelinated nerves
Cell volume regulation
  • Why regulate cell volume?
  • Cells in hypotonic and hypertonic solutions.
The synapse
  • An example, the neuromuscular junction
  • Vesicle formation
  • ACh release
  • ACh receptors
  • Acetylcholinesterase

 
 

Kenyon College -- Department of Biology