Rickets is caused by
A) overexposure to UV radiation.
B) an excess of calcitonin.
C) inadequate amounts of vitamin D.
D) an excess of ascorbic acid.
E) a fetal deficiency of thyroid hormone.

Question

Quizplus · Accepted Answer

Rickets is caused by a deficiency in vitamin D, which is necessary for the body to properly absorb and use calcium. Without sufficient vitamin D, bones can become soft, weak, and deformed. Overexposure to UV radiation can actually help the body produce vitamin D, so it is not a cause of rickets. Calcitonin is a hormone that helps regulate calcium levels in the body, but an excess of calcitonin would not directly cause rickets. Ascorbic acid (vitamin C) is important for collagen formation in bones, but an excess of it would not cause rickets. A fetal deficiency of thyroid hormone can lead to developmental abnormalities, but it is not a direct cause of rickets.

Rickets Is Caused by