Which of the Following Substances Acts on Its Target Cells $\left.\mathrm{IP}_{3}\right)-\mathrm{Ca}^{2+}$

Multiple Choice

Which of the following substances acts on its target cells via an inositol 1,4,5-triphosphate ( $\left.\mathrm{IP}_{3}\right) -\mathrm{Ca}^{2+}$ mechanism?

A) Somatomedins acting on chondrocytes
B) Oxytocin acting on myoepithelial cells of the breast
C) Antidiuretic hormone (ADH) acting on the renal collecting duct
D) Adrenocorticotropic hormone (ACTH) acting on the adrenal cortex
E) Thyroid hormone acting on skeletal muscle