VPY-0061
QUESTION
Target organ/cell of oxytocin in mammary gland is?
OPTIONS
(A) Duct cells
(B) Alveolar cells
(C) Gland cistern
(D) Myoepithelial cells
ANSWER
(D) Myoepithelial cells
EXPLANATION
Myoepithelial cells are the correct option because oxytocin binds receptors on mammary myoepithelial cells, causing them to contract and eject milk from the alveoli into the ducts. Duct cells and alveolar secretory cells are not the primary contractile targets of oxytocin, and the gland cistern is a storage space rather than a target cell.
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