Color: Many Colors (opal changes color) Opal, the only gem that doesn't fit into any single description of a precious stone, is the birthstone for October. It is said that no two opals are exactly alike. But it is sensitive to moisture and is more fragile than its fellow gemstones. It displays a brilliant array of colors which dazzle the eye.
1: When you are faced with stressful situations, cortisol, epinephrine, and norepinephrine are released by your. kidneys.
Like cortisol, epinephrine and norepinephrine are both stress hormones which rise in your bloodstream during exercise. Epinephrine are secreted by the medulla of the adrenal glands, which increases your heart rate, glucose breakdown, blood glucose and muscle strength. Norepinephrine also breaks down glucose and increases your heart rate, but it also breaks down fat for energy during exercise.