Calcitriol acts on: (A) G protein coupled receptor, (B) Cytosolic receptor, (C) Intranuclear receptor, (D) Enzymatic receptors
Answer is B. Bioactive vitamin D or calcitriol is a steroid hormone that has long been known for its impoant role in regulating body levels of calcium Nuclear or cytosolic receptors include the binding sites for steroid hormones, thyroid hormones, vitamin D, and retinoic acids Ref-Goodman and Gillman 12th/e p1282