Prolactin

safaTerkawi

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2022-08-15

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Prolactin.

Has a similar chemical structure and physiological action to luteinizing hormone.
Is responsible for breast growth in puberty.
Release is inhibited by dopamine.
Secretion is stimulated by suckling of the breast.
Causes pre-formed milk to be ejected by the breast during suckling.

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safaTerkawi

2022-08-15

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A. False They are distinct hormones with different actions.

B. False Breast growth depends on oestrogens and progestogens.

C. True This mediates hypothalamic regulation of prolactin levels.

D. True This is responsible for the maintenance of lactation in the puerperium.

E. False Milk ejection is a consequence of oxytocin secretion.

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