Pathology Which one of the following acts to increase the release of Ca2 from endoplasmic reticulum? A Inositol triphosphate B Parathyroid hormone C 1, 25-dihydroxy cholecalciferol D Diacyiglycerol 💡 Explanation Which one of the following acts to increase the release of Ca2 from endoplasmic reticulum? ✓ Correct Answer: A. Inositol triphosphate