The Answer is Papillary Dermis
The answer is
A. Hand washing
It is true that blood alcohol level (BAL) is the ratio between the
alcohol consumed and the blood in the body. It refers to the percentage
of alcohol found in your bloodstream. If this percentage is above a
certain level, and you are driving, for example, a police officer can
take you into custody for driving while under the influence of alcohol.
When the skin is exposed to ultraviolet rays, the skin produces a molecule that is turned into Vitamin D.
Sun is the source of ultraviolet rays important for Vitamin D production. Due to this reason, in the case of Vitamin D deficiency, it is recommended by doctor's to absorb sunlight by skin. The Vitamin D production occurs specifically by UV B rays rays which lie in the range of 290-315 nanometer.
The chemical 7-dehydrocholesterol absorbs these rays and convert to previtamin D3. Further, previtamin D3 isomerizes to Vitamin D. Other than sunlight, Vitamin D can be taken through diet. The sources include seafood like fish, fish oil, dairy products, beef liver etc. Vitamin D is required for bone and teeth formation, muscle contraction, immune system etc.
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