Ca2+ signaling functions to regulate many cellular processes. Dynamics of Ca2+ signaling or homeostasis is regulated by the interaction between ON and OFF reactions that control Ca2+ flux in both the plasma membrane and internal organelles such as the endoplasmic reticulum (ER) and mitochondria. External stimuli activate the ON reactions. which include Ca2+ into the cytoplasm either t... https://www.spidertattooz.com/OPI-Infinite-Shine-Combo-Base-Top-Indefinitely-Baby-ISL55-p26708/