Questions and Correct
Answers | New Update
How often does epidermal turnover occur? - ANSWER ✔✔Every 26-
42 days
Epidermal Cells: Keratinocytes - ANSWER ✔✔Produce keratin, make
of 80% of the epidermis
Epidermal Cells: Melanocytes - ANSWER ✔✔Determine the color of
the skin
Epidermal Cells: Langerhans Cells - ANSWER ✔✔Assist with skin
immune system
, Epidermal Cells: Merkel Cells - ANSWER ✔✔Provide tactile
reception, produce nerve growth factor
Rete Ridges/Pegs - ANSWER ✔✔Fingerlike extensions that anchor
the epidermis to the dermis
Skin pH - ANSWER ✔✔4.5-6.5
Dermal proteins - ANSWER ✔✔Collagen and Elastin
Dermal Cells: Fibroblasts - ANSWER ✔✔Produce collagen and other
proteins
Dermal Cells: Mast cells, Macrophages, & Lymphocytes - ANSWER
✔✔Cells involved in immune surveillance
Dermal appendages - ANSWER ✔✔Hair follicles, sebaceous glands,
sweat glands, nails
Emollients - ANSWER ✔✔soften skin an provide lipids (i.e. silicone,
dimethicone, lanolin, ceramide
Humectants - ANSWER ✔✔add water to skin (i.e. urea, lactic acid,
glycerin)