Growth Hormone

During childhood, step-up hormone is released by the anterior pituitary gland. Its trade is to stimulate epiphysial domicile activity. Long drum protract by interstitial growth of the epiphyseal plates, and the rest of the tusks grow in width by appositional growth. In recollective atomic number 76 growth epiphyseal plate cartilage organizes into a pattern that provides for quick effective growth. The cells at the pennant of the epiphyseal plate make up the growth zone. These cells split quickly and push the pineal gland away from the diaphysis. This process causes the long organize to lengthen. The sexagenarianer chondrocytes which are closer to the diaphysis hypertrophy, or enlarge and their lacunae erode and enlarge. The surrounding cartilage matrix gravels calcified and the chondrocytes last and deteriorate. This produces the calcification zone. The calcified spicules resulting from this process become part of the osteogenic zone. The osteogenic zone is invaded by vegetable marrow elements from the medullary infernal region. The osteoclasts erode the bone and then the osteoblasts cover the cavity with bone matrix which forms spongy bone. During childhood longitudinal bone growth is explained by almost continual remodeling of the epiphyseal bone ends.



This explains why proper proportions are maintained between the epiphysis and the diaphysis during bone growth.
Secretion of Thyroid hormones (estrogen and androgens) regulates the activity of growth hormone which enables the growing skeleton to maintain proper proportions by dint of the growth process, and the growth spurt experienced during adolescence. As adolescence comes to an end, the chondrocytes of the epiphyseal plates divide less often and the plates become thinner. As the plates become thinner, they are replaced entirely by bone tissue. Longitudinal bone growth will then end because the epiphyseal plate and the diaphyseal plate will then fuse. A gip but otherwise normal 25 year old would not benefit from growth hormone treatment because his or...If you emergency to get a full essay, order it on our website: Ordercustompaper.com



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