Physiology Which one one of the following acts to increase the release of Ca2+ from endoplasmic reticulum: A Inositol triphosphate B 4,Parathyroid hormone C 1, 25-dihydroxy cholecalciferol D Diacyglycerol 💡 Explanation Which one one of the following acts to increase the release of Ca2+ from endoplasmic reticulum: ✓ Correct Answer: A. Inositol triphosphate