KINESIOL 1AA3 Lecture Notes - Lecture 29: Oliguria, Pituitary Gland, Follicular Cell
5 Apr 2017
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Prolactin (prl) lactotrophs produce prolactin: hypothalamus regulates lactotroph cells prolactin inhibiting hormone (pih) + Prolactin releasing hormone (prh: under right conditions, prolactin causes milk production, pih is released most of the time pregnancy increases prh & suckling reduces. Ph: when nursing ceases & milk production slows, prh no longer released and pih is released once again. Adenocorticotropic hormone (acth) corticotrophs secrete acth: corticotropin-releasing hormone (crh) from hypothalamus stimulates corticotrophs, acth goes to adrenal cortex to produce/ secrete cortisol and other glucocorticoids, glucocorticoids inhibit crh & acth (negative feedback) Posterior pituitary gland: doesn"t actually synthesize hormones but stores/ releases oxytocin and antidiuretic. Hormone (adh: connected to neurosecretory cells of hypothalamus through axons posterior pituitary gland consists of axon terminals of hypothalamic neurons which release adh & oxytocin. Oxytocin affects uterus and breast: during delivery stretching of cervix stimulates release. Stimulates smooth muscle contraction in uterus (positive feedback loop: after delivery suckling & hearing baby"s cry stimulates milk ejection.
