A nerve fiber can be modeled electrically as an RC circuit as illustrated in Figure P22.62. The

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A nerve fiber can be modeled electrically as an RC circuit as illustrated in Figure P22.62. The interior of the fiber acts as a resistor, and the resistance is determined by the solution inside the fiber, which has a resistivity of about ρ = 0.1Ω m. The fiber’s membrane acts as a capacitor; its capacitance per unit area of membrane is about 10-2 F/m2.
(a) Estimate the R and C of the equivalent circuit in Figure P22.62.
(b) Is it a low-pass filter or a high-pass filter?
(c) What frequency separates the high and low frequency limits for this circuit?


Nerve fiber ) ; 0.5 mm Vin Vout 2 cm Figure P22.62


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