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 Rinse off well and pat it dry. 2  Before you go to bed, rub your feet with stridex pad which exfoliated your foot skin as it has 2% salicylic acid in it. 3  After this, apply a thick moisturizer (probably a petroleum jelly) or a salicylic cream on the bottoms of your feet. Now, soak your feet in warm water for about 10 to 15 minutes so that your feet are freed from minute dust particles and are clean and smooth. 2  With feet still in tub, slather the exfoliating agent over the foot and gently scrub your foot moving your hands in circular motions. 3  Repeat the same to other foot.