Question

multiple choice question
what is the role of vitamin d in bone development?
vitamin d decreases calcium absorption through the small intestine and thus prevents ex - cess calcium in the blood which could result in deformed bones.
vitamin d increases osteoclastic activity and thus helps to break down the bone matrix.
vitamin d increases calcium absorption in the small intestine and thus helps maintain the calcium concentrations necessary to build the bone matrix.
need help? review these concept resources.
rate your confidence to submit your answer.
high
medium
low
reading
© 2025 mcgraw hill. all rights reserved. privacy center terms of use

Explanation:

Vitamin D promotes calcium absorption in the small intestine, which is crucial for maintaining appropriate calcium levels needed to build the bone matrix. Osteoclasts break down bone, and vitamin D doesn't primarily increase their activity. Decreasing calcium absorption is not its role.

Answer:

Vitamin D increases calcium absorption in the small intestine and thus helps maintain the calcium concentrations necessary to build the bone matrix.