71210 Bioelectromagnetism - Exercises Autumn 2004

Source-Field Models: correct answers

1. Impressed current density may arise by
   1. stimulation electrodes
   2. concentration gradients
   3. transmembrane current flow
   4. all of the above
2. Current field strength due to a monopole in an infinite homogeneous conductor is proportional to
   1. r^2
   2. 1/r^2
   3. r^3
   4. 1/r^3
3. Potential field due to a dipole in an infinite homogeneous conductor is proportional to
   1. r^2
   2. 1/r^2
   3. r^1
   4. 1/r^1
4. Propagating action potential of cardiac muscle may be modeled by
   1. moving monopole
   2. moving double layer
   3. fixed tripole

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