Question

which of the following is a hormone that stimulates osteoblasts at the epiphyseal plate?
thyroxine
vitamin c
parathyroid hormone
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Explanation:

Thyroxine stimulates osteoblasts at the epiphyseal plate. Vitamin C is not a hormone. Parathyroid hormone mainly regulates calcium - phosphate metabolism and affects osteoclasts more than directly stimulating osteoblasts at the epiphyseal plate.

Answer:

Thyroxine