Flashcards in Skin Structure and Function 4 Deck (14):
6 Functions of the Skin?
Metabolism and detoxification
Communication (people see your skin)
Consequences of failure of barrier function of skin? (3)
Fluid loss = dehydration
Protein loss = hypoalbuminaemia
Consequence of failure of thermoregulation of skin?
Heath loss = hypothermia
Consequence of failure of metabolic processes of the skin?
Disordered thyroxine metabolism
Consequence of problem with sensory function of skin?
What does the skin act as a physical barrier to? (2)
Friction/ mechanical trauma
Why does UV burn when physical light doesn't?
The shorter the wavelength, the less it penetrates the skin but the more energy is attached to each proton - UV wavelength is shorter
What 2 products is the skin involved in the metabolism of?
Dietary sources of vitamin D?
Food fortified with vitamin D e.g. dairy products, orange juice, soy milk, cereals
What does vitamin D do?
Increases calcium absorption from the bowel
Promotes mineralisation of bone
Where does vitamin D from the diet and skin go?
What happens here?
Turned into 25 hydroxy-vitamin D
What happens to 25 hydroxy-vitamin D formed in the liver?
Made into active vitamin D (1, 25 dihydroxy-vitamin D3) in the kidney
What thyroid hormone is produced in the thyroid glands?
What happens to this?
Where does this occur?
It must be converted into tri-iodothyronine (T3)
20% = thyroid gland
80% = peripheral (to thyroid) tissue including the skin