Question

Vitamin D is important for bone health because it also directly performs which function of PTH?

1) increased reabsorption of calcium from the renal tubules
2) increased absorption of calcium from the small intestine
3) decreased reabsorption of phosphate
4) increased osteoclast activity

Answer 1

Vitamin D functions in conjunction with parathyroid hormone (PTH) to support bone health by increasing the reabsorption of calcium from the renal tubules. option 2

Step-by-step explanation:

Vitamin D performs multiple functions in the body, including directly impacting the function of parathyroid hormone (PTH). One of the functions of PTH is to increase the reabsorption of calcium from the renal tubules, which helps maintain normal calcium levels in the blood and supports bone health. Vitamin D works in conjunction with PTH to promote the production of calcium-binding protein in the small intestine, which increases the absorption of calcium from the diet. Therefore, the correct answer is option 1) increased reabsorption of calcium from the renal tubules.