Tag Archives: protein molecules

Hormones

Hormones are biochemical messengers that regulate physiological events in living organisms. More than 100 hormones have been identified in humans. Hormones are secreted by endocrine (ductless) glands such as the hypothalamus, the pituitary gland, the pineal gland, the thyroid, the parathyroid, the thymus, the adrenals, the pancreas, the ovaries, and the testes.

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Sun Rays

Human skin has special cells, melanocytes. These cells provide natural, built-in sun protection. You can see it in action each time you tan. Melanocytes produce dark brown substance, called melanin, which does not allow sun rays to penetrate deep into the skin layers as it would be damaging. At the same time sun light stimulates cell generation, skin becomes thicker, and therefore more resistant to UV rays. Turns out the sun is actually good for the skin.

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