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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Answer:
Explanation:
E Aids , A is hepatitis b,C is type 2 ,D type 1, and B is HIV
what are the answer choices?
Rhumetoid Arthritis: chronic arthritis. swollen and stiff joints, can be crippling, classified as an autoimmune disease.
Osteoarthritis: caused by joint degeneration (the destruction of cartilage) resulting in bone rubbing against bone.
I'm not sure which one of this it is, but the answer is a form of arthritis
1. Muscle Endurance
2. Cardiovascular Fitness
3. Muscle Strength
4. Flexibility
5. Body Composition
