Articles > Epidermis definition – quiz Epidermis definition – quiz Quiz Choose the best answer. 1. In humans, epidermis is part of which system? Digestive system Nervous system Integumentary system 2. Which of the following is NOT a function of the epidermis? Mechanical barrier Vitamin D production Store fat in adipocytes 3. The strong fibrous structural protein in the epidermis Keratin Keratinocyte Defensins 4. Epidermal layer made up of dead keratinocytes Stratum lucidum Stratum granulosum Stratum corneum 5. Openings in the epidermis of leaves of plants Guard cells Stomata Trichomes Send Your Results (Optional) Your Name To Email Time is Up!