Apocrine secretion occurs when gland cells shed the apical portion of their cytoplasm, which has become packed with secretory vesicles.

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Apocrine secretion is a type of secretion in which the apical portion of the gland cells' cytoplasm is shed along with secretory vesicles. This is different from merocrine secretion, which involves release of secretory vesicles from the gland cells without loss of cytoplasm.

Apocrine Secretion Occurs When Gland Cells Shed the Apical Portion