1. What is the barrier created by skin using both sebum and sweat? Answer: Acidmantle 2. What is the chemical reaction in which the oxidizing agent is reduced andthe reducing agent is oxidized? Answer: Oxidation-reduction (redox) 3. What is the subtraction of oxygen or the addition of hydrogen called? Answer: Re-duction 4. What does it mean if a liquid is immiscible? Answer: The liquids are not mutuallysoluble. 5. What does hydrophilic mean? Answer: Water loving 6. What does lipophilic mean? Answer: Oil loving 7. What are electrotherapy treatments often called? Answer: Modalities 8. What are the most common used modalities in aesthetics today? Answer: Galvaniccurrent, microcurrent, and Tesla high-frequency current 9. What type of current is a galvanic current? Answer: Direct current 10. What modality uses an extremely low level of electricity that mirrors thebody's own