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Osteoporosis has 3 causes excess parathyroid hormone, advanced age, and lack of estrogen in older females.

1. Estrogen promotes the activity of osteoblast and inhibits osteoclast.
2. Parathormone promotes mobilisation of calcium from bone into blood.

Correct answer: Parathormone promotes mobilisation of calcium from bone into blood.

Solution

Parathyroid hormone helps regulate calcium levels in the blood.

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