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.
This dead skin on the feet can easily be removed, leaving your feet soft and pliable and ready to show off. To remove dead skin from feet, you will need: 1  cup of white distilled vinegar. 2  two gallons of warm water. 3  pumice stone. 4  container big enough to soak feet. 5  soap. 6  Wash feet as you normally would with soap and water.7  This will help remove any dirt and grime off the feet so that the vinegar soak can actually help your feet. Gently pat your feet dry ensuring they are completely dry before moving onto step four. 2  Using the pumice stone is easy. 3  Gently rub the pumice stone over the bottoms of your feet to remove all dead skin.