Problem
Assume an unmyelinated axon has an internal diameter of 1 pm and an internal specific resistance of 100 Ω cm. Assume the single plasma membrane is 7.5 nm thick and has a dielectric constant of 8. The transmembrane resistance is 1000 Ω cm2.
1. Calculate the internal resistance per unit length.
2. Calculate the transmembrane resistance per unit length.
3. Calculate the space constant.
4. What would happen to the space constant if the axon was larger? What would that mean in terms of electrical conduction?