How is vitamin D (vitamin D₃)related to calcium homeostasis in bone?
A)Vitamin D provides a framework for calcium in the matrix.
B)Vitamin D is regulated by osteoclast activity.
C)Vitamin D is produced by osteoblasts during endochondral ossification.
D)Vitamin D is involved in calcium absorption by the digestive tract.
E)Vitamin D replaces calcium in the skeleton.

Question

Quizplus · Accepted Answer

Vitamin D plays a critical role in calcium homeostasis in bone by promoting calcium absorption from the digestive tract. Vitamin D helps regulate calcium absorption in the intestines by increasing the expression of calcium-binding proteins and transporters, which enhances the amount of calcium that is absorbed into the bloodstream. Once in the bloodstream, calcium can be transported to the bone for deposition and storage.

How Is Vitamin D (Vitamin D₃)related to Calcium Homeostasis in Bone