Calcium levels in the blood are primarily maintained through the interactions of two different hormones: calcitonin and parathyroid hormone. Based on your understanding of homeostasis through feedback mechanisms, we could also describe the action of these hormones as:

Question

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Calcitonin works to lower blood calcium levels by promoting its deposition in bones, while parathyroid hormone works to increase blood calcium levels by promoting its release from bones, absorption from the intestines, and reabsorption from the kidneys. These two hormones have opposite actions on blood calcium levels, demonstrating the concept of feedback mechanisms in homeostasis.

Calcium Levels in the Blood Are Primarily Maintained Through the Interactions