active chief cell of parathyroid gland
active chief cell of parathyroid gland
A parathyroid chief cell that is actively secreting hormone. Have large Golgi complexes with numerous vesicles and small membrane-bound granules; secretory granules are rare, cytoplasmic glycogen sparse, much of the cytoplasm being occupied by flat sacs of granular endoplasmic reticulum in parallel arrays; in normal humans, inactive chief cells outnumber active chief cells in a ratio of 3-5:1