INTEGBI 131 Lecture Notes - Lecture 15: Pars Tuberalis, Pars Intermedia, Supraoptic Nucleus
6 Jan 2020
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Endocrinology: study of hormones & endocrine glands (ductless endocrine glands secrete hormones/messengers into blood > influence target cells on specific tissues) Pure endocrine organs: pituitary, pineal , thyroid, parathyroid, adrenal glands tappp. Organs w/endocrine cells that have other functions: pancreas (acinar- dig enz/exocrine), thymus , gonads, hypothalamus. Pineal gland : (pine cone shape) in epithalamus (on roof of diencephalon [of prosen]) Hypothalamus secretes hormones to control anterior pituitary : Synthesizes & secretes melatonin (sleep/wake) (hypothalmic-adenohypophysial connection) Examples of hormones: gn rh , p rh , gh rh , etc. Inhibiting hormones (turn off secretion from ant pituit) A denohypophysis ( a nterior lobe/pituitary gland) (divisions) pars distalis, pars intermedia, pars tuberalis dit ant. Tropic hormones regulate other glands (acth, tsh, fsh, lh) Hormones acting on non-endocrine target tissue (gh, lph, prl, msh) Neurohypophysis (posterior lobe/pituitary gland) (divisions) pars nervosa & infundibulum. Hypothalamic neuron cell bodies synthesize oxytocin (paraventricular nucleus) & adh (supraoptic nucleus)
