MOJ Cell Science & Report
"Hormones and neurotransmitters regulate cell functions by binding to their receptors, which activate intracellular signaling and produce the physiological response . There are several intracellular pathways, including but not limited to, leading to the activation of protein kinases, phosphatases and increase in intracellular calcium (Ca2+) ."
Cook, Kelli; Petreska, Natasa; and Bouyer, Patrice G., "IRBIT a Master Regulator of Cell Physiology" (2017). Biology Faculty Publications. 35.