Which of the following is the target of parathyroid hormone?
A
Kidneys
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B
Bones
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C
Small intestine
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D
Both A and B
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E
Pancreas
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Solution
The correct option is B Both A and B Parathyroid hormone regulates the level of calcium in the blood. It does this through its actions on the kidneys, bones and intestine. When the blood calcium level is too low, the parathyroid glands release more parathyroid hormone (PTH). This causes the bones to release more calcium into the blood, increase the absorption of more calcium through food and reduces the amount of calcium released by the kidneys into the urine.