Answer:
D it increases the blood flow throughout the body.
Explanation:
Answer:
189.1
Explanation:
maximum heart rate = (HRmax)
The better formula is: HRmax = 208 − (0.7 × age).
208 − (0.7 × 27) = 189.1
Here is an example for a 25-year-old: 208 − (0.7 × 25) = 190.5.
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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Very high iron foods will increase blood cell count
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