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.
Norepinephrine increases. blood flow to the vital organs, such as the brain, increased mental. alertness, enlarged airways, and increased breathing rate. In other words, it helps the body cope with emergency and stress situations. c. Cortisol. Cortisol is one of the glucocorticoids produced by the adrenal cortex.