Does any one know this q'z?

I disagree. It is much more likely that active transport is the mode of molecular movement. Facilitated diffusion (or facilitated transport) is a method of pive transport using carrier proteins which usually provide channels for molecules to overcome repulsion in hydrophobic or hydrophilic layers of the cell membrane. The intracellular concentration of the molecule never increases when the extracellular concentration is lower in either ordinary diffusion or facilitated diffusion. On the other hand, molecules can diffuse against the concentration gradient by active transport, which consumes energy, unlike facilitated diffusion. Since the cells used energy when the molecule was present extracellularly, and molecules aculated in the cell even when the concentration was lower outside, it is clearly active transport.