What is one way that calcitonin and parathyroid hormone maintain homeostasis?

The metabolism of calcium or calcium homeostasis refers to the procedure by which the body sustains appropriate levels of calcium. The bone functions as an essential storage place for calcium, as it comprises 99 percent of the overall calcium in the body.  

The discharge of calcium from the bone is monitored by parathyroid hormone, and the incorporation of calcium in the bone is stimulated by calcitonin. When the concentration of the calcium in the blood elevates, the parafollicular cells of the thyroid gland enhance secretion of calcitonin in the blood.  

At the similar time, the parathyroid glands minimize the secretion of parathyroid hormones into the blood. The resulting greater levels of calcitonin in the blood instigate the bone to withdraw calcium from the plasma of the blood and deposit it like a bone.  

However, when the level of calcium in the blood is too low, the secretion of calcitonin is prevented and secretion of parathyroid hormone is stimulated. This leads to withdrawal of calcium from the bone to correct the levels of calcium in the blood.  

what are the choices?

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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