The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.
Remove dead skin from hands and feet. The basic way to exfoliate hands and feet begins with keeping them in warm soapy water for at least 15 minutes. You will notice that your skin has become ultra soft. Now the time begins to exfoliate your hands and feet. Apply the scrub to skin and rub it for 15 minutes.
1 Soak your feet in warm water for about 20 minutes to half an hour till the skin becomes soft. 2  Then using the foot shaver, shave all the dead skin in short and gentle strokes. 3  In between keep washing the shaver to get clean the dead skin scraped off.4  This is how to remove dead skin on foot. Soak your feet in warm water for about 20 minutes to half an hour till the skin becomes soft. 2  Then using the foot shaver, shave all the dead skin in short and gentle strokes. 3  In between keep washing the shaver to get clean the dead skin scraped off.