BIOM 3200 Lecture Notes - Lecture 1: Water–Electrolyte Imbalance, Lactation, Morphine

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Pituitary gland is divided into the anterior pituitary and posterior pituitary. The posterior pituitary stores and releases hormones that are produced by the. The anterior pituitary produces and secretes its own hormones. The anterior pituitary is regulated by hormones secreted by the hypothalamus and by feedback from the target gland hormones. A pars intermedia a strip of tissue between the anterior and posterior lobes exists in fetuses or animals only. The posterior lobe is the neural part of the pituitary gland: consists of the pars nervosa (posterior pituitary) this is in contact with the adenohypophysis and the infundibulum. Nerve-fibers extend through the infundibulum with small neuroglia-like cells called pituicytes. Trophic hormones: the hormones secreted by the anterior pituitary (pars distalis of the anterior lobe) Trophic means feed: high concentrations of anterior pituitary hormones cause target organs to hypertrophy, while low levels cause organs to atrophy. Growth hormone (gh/somatotropin) target: most tissue: look below.

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