![]() ![]() Parathormone binds to a membrane receptor protein which appears to be identical in bone and kidney but found in non-target organs. It is synthesized as a 115 amino acid precursor molecule pro-PTH. Parathormone (parathyroid hormone) is composed of 84 amino acid residues. ![]() The adipocytes may constitute more than 50% of the gland in old individuals. The chief cells are replaced by fat cells (adipocytes).They are large polygonal cells with small dense nuclei and deep eosinophilic cytoplasm.īy EM: The cytoplasm contains many mitochondria with abundant cristae which are the cause of eosinophilia observed by LM.They are few in number, usually found in clusters.
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