What is the physiological consequence of a diet lacking sufficient calcium?

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Activation of the thyroid glandEnhanced capacity to form fibrin cross-linksSecretion of calcitonin leading to decreased blood calciumRelease of parathyroid hormone causing bone breakdownIncrease in vitamin D synthesis

Explanation

When calcium intake is inadequate, the body responds by releasing parathyroid hormone (PTH), which promotes the breakdown of bone tissue to elevate blood calcium levels. This compensatory mechanism helps maintain calcium homeostasis.