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25 Cards in this Set
- Front
- Back
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Prolactin/ACTH are _______________ hormones.
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peptides/polypeptide
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Thyroxin and epinephrine are derived from?
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Amino Acids
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Pituitary gland is derived from?
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oral and neural ectoderm.
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Oral ectoderm (Rathke's Pouch) -->
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Adenohypophysis
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Downgrowth of the diencephalon -->
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Neurohypophysis
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Anterior lobe
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Pars Distalis
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Posterior lobe
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Pars intermedia, pars nervosa
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Pituitary Stalk
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Pars tuberalis, Infundibulum
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Pars distalis, Intermedia and tuberalis are derived from?
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Adenohypophysis
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Neurohypophysis forms?
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Pars nervosa and Infundibulum
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Chromophils
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hormone producing cell of the anterior pituitary.
6 hormones: Glycoproteins: 1. FSH, 2. LH, and 3. TSH or Thyrotropin Peptide Hormones: 4. GH/Somatotropin 5. Prolactin 6. ACTH |
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Somatotropes, acidophils, produce
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GH
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Lactotropes acidophils
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Prolactin
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Thyrotropes Basophil
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TSH
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Gonadotropes Basophil produce
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LH and FSH
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Corticotropes Basophils produce
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ACTH
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Somatotropes (GH cells) 50% hormone producing cells and they are under the control of GHRH. They increase metabolic rates and stimulates the liver to produce?
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Insulin-like GF I (Somatomedin) which promotes long bone growth
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Lactotropes or Mammotropes (PRL cells 15-20%) secrete prolactin and are under control by PRH. They promote mammary gland development and milk production. Estrogen and Progesterone do what?
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inhibition of secretion during pregnancy but when birth occurs their levels drop and causes lactation.
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Thyrotropes (TSH cells 5%) secrete thyrotropin and it is under control by TRH. Stimulates the growth of the thyroid epithelial cells and produces?
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thyroglobulin and thyroid hormones
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Gonadotropes (FSH and LH cells 10%) secrete?
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FSH and LH and are under the control of GnRH
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LH
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regulation of the final maturation of ovarian follicle and androgen secretion in the testis
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FSH
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stimulates follicular development (ovary) and spermatogenesis (testis)
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Corticotropes (ACTH cells 15-20%) secrete Adenocorticotropic hormone stimulated by CRH. The regulates the production of?
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glucocorticoids by the cortex of adrenal glands
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Chromophobes (small weakly staining cell)
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have less cytoplasm than chromophils.
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Blood supply: what is used in hormonal regulation of the pars distalis by the hypothalamus?
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hypothalamohypophyseal Portal system
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