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HCS 212 Exam Questions And Accurate Answers
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HCS 212 Exam Questions AndAccurate Answers
Epiphyseal plate - Answer - area of cartilage in the metaphysis
- also called the epiphyseal cartilage
- cartilage near the diaphysis is converted to bone
- the width of this zone gets narrower as we age
Enlarging the diameter of bone - Answer - called appositional growth
- blood vessels that run parallel to the bone becomes surrounded by bone cells
- "tunnels" begin to form
- each "tunnel" has a blood vessel in it
- osteoblasts begin to produce matrix, thus creating concentric rings
as osteoblasts are laying down more bone material, osteoclasts are dissolving the inner
bone, thus creating the marrow cavity
Factors regulating bone growth - Answer - nutrition
- calcium ions
- phosphate ions
- magnesium ions
- citrate
- carbonate ions
- sodium ions
- vitamins A, C, D (calcitriol)
- hormones
Hormones: Parathyroid Gland - Answer - releases parathyroid hormone
- stimulates osteoclasts
- stimulates osteoblasts
- increases calcium ion absorption from the small intestine to the blood
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