Some people actually need the drugs for medical reasons but another percentage of people abuse it by overdosing, getting addicted or even selling drugs to other people that will just abuse it as well. Many people yearly have died due to overdose and drug abuse in the US. Sometimes people don't know how to control them selves. Even patients that are prescribed drugs can lead to getting addicted to it.
The two endocrine glands responsible for maintaining serum calcium levels are the thyroid and parathyroid.
The thyroid gland, specifically the thyroid C cells, secretes the hormone calcitonin which contributes to the decrease in serum calcium levels. On the other hand, the parathyroid gland has the function of increasing the levels of calcium by secreting parathormone.
Both hormones are also responsible for the regulation of phosphorus levels.
The function of calcitonin allows:
<em>Avoid the processes of intestinal absorption calcium and bone resorption, decreasing calcium in the blood.
<em>Facilitates renal excretion of calcium.
The paratohormone has an activity opposite to calcitonin and allows
<em>Intestinal reabsorption of calcium.
<em>Increases renal reabsorption of calcium.
Both effects depend on the production of hormones by the thyroid and parathyroid glands, in response to increased or decreased blood calcium levels, for maintenance of homeostasis.