Question

A cell membrane has a resistance and a capacitance and thus a characteristic time constant.

A) What is the time constant of a 7.5 nmnm -thick membrane surrounding a 4.4×10⁻² mmmm -diameter spherical cell? Assume the resistivity of the cell membrane as 3.6×1063.6×106 Ω⋅mΩ⋅m and the dielectric constant is approximately 9.0.

Express your answer to two significant figures and include the appropriate units.

Answer 1