Skip Navigation

American Zoologist 1967 7(4):883-895; doi:10.1093/icb/7.4.883
© 1967 by The Society for Integrative and Comparative Biology
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Request Permissions
Google Scholar
Right arrow Articles by URIST, M. R.
Right arrow Search for Related Content
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Avian Parathyroid Physiology: Including a Special Comment on Calcitonin

MARSHALL R. URIST
Department of Surgery, Bone Research Laboratory, University of California School of Medicine, Los Angeles, Calif. 90024

During the reproductive cycle, the females of avian species metabolize large amounts of calcium, deposit large amounts of apatite in intramedullary bone, and develop hyperplastic and hypertrophied parathyroid glands. Secondary hyperparathyroidism develops when the amount of calcium in the diet is low. Hyperparathyroidism, either endogenous or from injections of parathyroid extract, produces resorption of endosteal bone and not mobilization of the deposits of intramedullary bone that normally store calcium for calcification of the eggshell.The specificity of the site of action of the hormone suggests that the process of mobilization of mineral from intramedullary bone and fluctuations in the level of calcium in the blood are attributable not to the action of the parathyroid hormone but indirectly to cyclical changes in the output of estrogen. Methods of measurement of calcium kinetics, parathyroid hormone-induced metabolic processes, and cellular reactions of bone cells to calcitonin should be investigated in vitro in explants of intramedullary bone to learn more about the specialized physiological characteristics of the tissue.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.