🧱 Epidermis Layers
What is the outermost layer of the epidermis?
Stratum Corneum
Which cells produce melanin?
Melanocytes
What does TEWL stand for?
Trans Epidermal Water Loss
What type of UV causes sunburn?
UVB
What is the function of free radicals?
To speed up aging process and creates an unhealthy state of the skin
Which layer contains cells that continuously divide?
Stratum Germinativum/ Basale
What cells protect against antigens?
Langerhans Cells
What is the normal pH of the skin?
5.5
What is the leading cause of premature aging?
UV Exposure
What is the acid mantle made of?
Water, lipids, sweat, and sebum
Which layer is only found on palms and soles?
Stratum Lucidum
How often are cells of the bones replaces?
Every 7 years
What connects the dermis to the epidermis?
DEJ or Dermal/Epidermal Junction
What protein gives the skin strength?
Collagen
What is the main cause of women’s skin continuously changing?
Hormonal changes in the reproductive and endocrine system.
ex: pregnanc, puberty, menopause etc.
What are keratinocytes responsible for?
Producing keratin proteins
What are 2 types of glands in the skin?
Sebaceous & Suderiferous Glands
What is the function of desquamation?
Removal of dead skin cells to allow new cells to surface and keep skin smooth and healthy
Which UV penetrates deeper and causes aging?
UVA
What do fibroblasts produce?
Collagen, elastin, and glycosaminoglycans
Which junctions hold keratinocytes together?
Desmosomes
Where are apocrine glands located?
Axillary (under the arms) and Groin
What are the 2 types of nerves and their function?
Sensory (afferent): send messages to the central nervous system and brain to react to heat, cold, pain, pressure, and touch.
Motor (efferent): carries messages from the brain anf spinal cord to the muscles to cause movement.
What is glycation?
Sugar binding to collagen, making it stiff
What is microcirculation ?
Circulation of blood from the heart to arterioles (small arteries), to capillaries , to venules (small veins), and then back to the heart.