What are the effects of vitamin D?

Hormone Vitamin D3(cholecalciferol) Hormone Originates from:Dietary intakeSynthesis in the skin through effects of UV light on 7-dehydrocholesterolModified by liver and kidney to form active 1-25-hydroxycholecalciferol - under the influence of parathyroid...

What is calcitonin? Where is it produced, what are its effects?

Hormone Calcitonin(minimal role) Hormone Peptide hormone produced by parafollicular cells of the thyroid glandSecretion stimulated by an increase in serum calcium levels Hormone Acts to decrease serum calcium levels when elevated (physiological antagonist to PTH)Bone:...