Serum levels of this element are adjusted for binding to albumin in order to detect its surplus, which can result in a hypothermia-like Osborn wave and short QT interval. The Chvostek sign can detect 
Serum levels of this element are adjusted for binding to albumin in order to detect its surplus, which can result in a hypothermia-like Osborn wave and short QT interval. The Chvostek sign can detect tetany from low serum levels of this element, and parafollicular cell secretions lower the blood concentration of it stored in sarcoplasmic reticulum. When this element bonds to troponin C, present in actin-containing myofibrils, tropomyosin is allowed to move. Increased in the blood by parathyroid hormone, this element can help prevent osteoporosis. For 10 points, name this element whose phosphate is found in bone, an alkaline earth metal with atomic number 20 and symbol Ca. 
Serum levels of this element are adjusted for binding to albumin in order to detect its surplus, which can result in a hypothermia-like Osborn wave and short QT interval.
calcium [accept Ca before mention] 