Axons in the brain have smaller diameters than motor neurons; 0.6 μm is a typical value. Most connections are short range, with an average axon length of about 700 μm. The resistivity of the 7-nm-thick axon membrane is approximately 4x1072-m; the dielectric constant is 5. Model the axon as a cylinder. Part A What is the resistance of the axon membrane? Express your answer with the appropriate units. μA R= Value T= What is the time constant of the axon membrane? Express your answer with the appropriate units. μA Units Value d ? Units ?

Axons in the brain have smaller diameters than motor neurons; 0.6 μm is a typical value. Most connections are short range, with an average axon length of about 700 μm. The resistivity of the 7-nm-thick axon membrane is approximately 4x1072-m; the dielectric constant is 5. Model the axon as a cylinder. Part A What is the resistance of the axon membrane? Express your answer with the appropriate units. μA R= Value T= What is the time constant of the axon membrane? Express your answer with the appropriate units. μA Units Value d ? Units ?