Answer:
The answer is - The calcitonin injections will increase the rat's vertebral bone density (indicated by a less-negative T score)
Explanation:
Calcitonin is produced in the thyroid gland by the parafollicular cells. It is a hormone which prevents the development of osteoporosis by reducing bone resorption and is known to increase bone density. Administering calcitonin to the rats resulted in their T score becoming less negative compared to the control rat therefore showing that it reduced the progression of osteoporosis.