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Endocrine system - 1

Endocrine system

who is the master gland? the Pituitary Gland - because it directs the activity or release of hormones by other endocrine glands/organs.
Anterior Pituitary Adeno.hypophy.sis
Posterior Pitutiary Neurohypophysis
What are the 7 hormones produced by the adenohypophysis ? Growth hormone Prolactin Thyroid-stimulating hormone Adrenocorticotropic hormone Follicle stimulating hormone Luteinizing hormone Melanocyte-stimulating hormone THESE HORMONES GO ON TO STIMULATE OTHER GLANDS
what are the three regions of the adenohypophysis? Pars distalis (largest) Pars tuberalis (around infundibulum) Pars intermedia - (slender, posterior lobe)
Describe the vascular network of the adenohypophysis (anterior pituitary)PORTAL SYSTEM Starts at superior hypophyseal artery - firt cap bed surrounds the hypothalmus - reconsolidate into 2 - expand into 2nd cap bed surrounding anterior hypophysis. reconsolidate. Drain through the Hypophyseal veins with anterior pituitary hormones.
Describe the vascular network of the Posterior pituitary (neurohypophysis) STORES 2 HORMONES - (AntiDiruticHormone & OXYTOCIN produced in hypothalmus) transported down nerve fibers (down infundiblium by axoplasmic transport) directly to the posterior pituitary where are stored
Pars Nervosa where ADH & Oxytocin are stored in the neurohypophysis
ADH/Vasopressin made by... cells of the Supraoptic nuclei of the hyphothalamus
Oxytocin made by... cells of the Paraventricular nuclei of the hypothalamus
NS control of pitutiary gland, what is the bridge between nerve tissue & endocrine tissue? the diencephalon - influence over body temp, sleep...nervous connection b/w higer brain centers & endocrine function/gland
Pituitary glad is attached to hypothalamus by... a stalk of blood vessels & nerve fibers
hormones secreted by the Hypothalamus travel short distance to anterior pituitary. hormones can be inhibiting/releasing traver to AP through the portal system
What are the five release/inhibiting factors of the hypothalamus that direct the anterior pituitary? 1. Thyrotropin RH - stimulates release of Thyroid SH - stimulates thyroid gland 2. corticotropin RH - release of adrenocorticotropic H - adrenal cortex 3. gonadotropin RH - release of FSH & LH - stim ovaries & testes
continued, What are the five release/inhibiting factors of the hypothalamus that direct the anterior pituitary? 4. Prolactin R/I H - S/I release of prolactin - mammary gland dev & milk production 5. Growth R/I H - R/I growth hormone
Products of the Anterior Pituitary 1. growth hormone- growth in the young, bone & muscle - breakdown of fats, release of glucose from cells 2. Prolactin -- in female, trigger & maintain milk production 3. Thyroid sH - growth & dev of Thyroid gland , stimulates it to produce thyroxin
continued, Products of the Anterior Pituitary 4. Adrenocorticotropid ACTH - growth & dev of adrenal cortex & cause it to release its hormones (periphery of adrenal gland) 5. Follicle SH - growth&dev of follicles in ovaries (estrogen) & sperm production in testes in male
continued, Products of the Anterior Pituitary 5.Luteinizing hormone - complet dev process of follicle in ovary, cause ovulation - from left over follicle, produce corpus luteum when goes to Progesterone Male - testosterone production 7. Melanocyte - pigmentation changes in fish, amphibian, reptile
Products of Posterior pituitary 1.ADH - prevent diuresis(cause kidney to resorb H2o) released by pit when hypothalmus detects dehydration - inhibited by Alcohol &caffeine 2. Oxytocin - effect on mammary gland/uterus, "Milk letdown" near to teat, uterine contractions during labor
Diabetes Insipidus a deficiency or lack of renal responsivness to ADH
Created by: Yourdanos
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