innovation1,
The difference can be explained from the fundamental equations.
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For an inductor, v = Ldi/dt, Where V is the voltage across the inductior, L is the inductance, di/dt is the rate of change of current thru the inductor. For high frequencies, di/dt is a high value, therefore the voltage across the inductor is high. For DC, di/dt is zero, therefore the voltage across the inductor is zero.
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For a capacitor, i = C dv/dt, where i is the current thru the capacitor, C is the capacitance, dv/dt is the rate of change of voltage across the capacitor. For DC, dv/dt is zero. Therefore the current through the capacitor is zero.
Regards,
Kral