How do warm up and cool down activities differ?

Which of the following identifies a main culprit for america’s increasing weight gain

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer

Amino acids are important to the body because they build carbohydrates proteins complex carbohydrates simple sugars fats