71210 Bioelectromagnetism - Exercises Autumn 2004

Nerve and muscle cells: correct answers

1. All living cells exhibit a voltage difference across the cell membrane.
   1. True
   2. False
2. Excitability is a property of following cells:
   1. Bone
   2. Nerve & muscle
   3. Fat
   4. All of the above
3. Thickness of a cell membrane is in the order of
   1. metres
   2. millimetres
   3. micrometres
   4. nanometres
4. Transmembrane voltage Vm is defined by intra- and extracellular potentials as
   1. Fout - Fin
   2. Fin - Fout
5. The speed of the action potential propagation is proportional to
   1. Strength of the stimuli
   2. Capacitance of the membrane
   3. Both of the above

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