Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 6 - Bones and Skeletal Tissues - Review Questions - Page 197: 8


(b) osteoblasts and osteoclasts

Work Step by Step

Osteoblasts are in charge of bone formation.They secrete an organic matrix called osteoid. Growth hormone controls the growth and is aided by androgen and estrogen during puberty. Osteoclasts are responsible for the breakup of the bone. Osteoclasts are large and multinucleated and it contains a lot of mitochondria (ATP=energy) and lysosomes (enzymes=breakup). The parathyroid hormone (PTH) stimulates the release of calcium ions into the blood causing hypercalcemia (abundant calcium).
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