Human Anatomy and Physiology, 9e

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Anterior Adenophypophysis Posterior
Neurophypohysis
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Adenohypophysis --superior hypohphyseal
artery--portal system in pars tuberalissuperior
hypophyseal vein. Hypothalamic neurons release
hormones into portal sytem.
Pars Tuberalis
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Neurovascular hypothesissecretions from
hypothalamic neurons regulate pituitary
secretion. PVN and SON neurons synthesize
hormones (oxytocin vasopressin) that are
released directly. Other nuclei secrete hormones
that control the adenohypophysis (via portal
system)
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Hyposecretionhypothalamic disease,
tumor Hypersecretionpituitary tumors, enhanced
hypothalamic stimulation