When blood calcium levels rise above the normal set point, which hormone is secreted by the thyroid gland to lower it?
Q1. When blood calcium levels rise above the normal set point, which hormone is secreted by the thyroid gland to lower it?
Answer: Calcitonin
Explanation: Calcitonin reduces blood calcium levels by depositing it in bones; parathyroid hormone is tempting as it performs the exact opposite regulatory function.