Skeletal System - Bone Remodeling & Calcium Homeostasis

6 important questions on Skeletal System - Bone Remodeling & Calcium Homeostasis

Q: Which hormone increases blood calcium by stimulating osteoclasts?

A: Parathyroid hormone (PTH)

Q: Which hormone decreases blood calcium by stimulating osteoblasts?

Calcitonin

Q: What role does vitamin D play in bone health?

A: Enhances calcium absorption in intestines
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Q: How often is the adult skeleton completely remodeled?

A: Roughly every 10 years

Q: Which bones remodel the fastest?

A: Spongy bone (replaced every 3–4 years)

Q: Which bones remodel the slowest?

A: Compact bone (every 10 years)

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