Endocrinology Flashcards
What is apoptosis?
Programmed cell death, quiet, no inflammation, nucleus gides it=> destroyed last.
What is necrosis?
Non programmed cell death, noisy, inflammation, nucleus destroyed first.
What is pyknosis?
Nucleus turns into blebs
What is karyorexis?
Nucleus fragments
What is karyolyisis?
Nucleus dissolves
What is a somatotroph?
GH
Whai is a gonadotroph?
LH, FSH
What is a thyrotrophe?
TSH
What is a corticotroph?
ACTH
What is a lactotroph
PRL
What receptors do protein hormones use?
Cell membrane receptors
What receptors do steroid hormones use?
Nuclear membrane receptors
What are the steroid hormones?
PET CAD ( thyroid hormone acts like a steroid) Progesterone E2 Testosterone Cortisol Aldosterone Vid D
What does endocrine mean?
Secretion into blood
What does exocrine mean?
Secretion into non blood
What is autocrine?
Works on itself
What is paracrine?
Work’s in it’s neighbor
What is merocrine?
Cell is maintsined=> exocytosis
What is apocrine?
Apex of the cell is secreted
What is holocrine?
The whole cell is secreted
What oragns do not require insulin?
BRICKLE Brain RBC Intestine Cardiac, Cornea Kidney Liver Exercising muscle
What does GnRH do?
Stimulates LH, FSH
What does GRH do?
Srimulates GH
What does CRH do?
Stimulates ACTH
What does TRH?
Stimulates TSH
What does PRH do?
Stimulates PRL
What does DA do?
Inhibits PRL
What does SS do?
Inhibits GH
What does ADH do?
Conserves water, vasoconstricts
What does oxytocin do?
Milk let down, baby let down
What does GH do?
IGF-1 release from liver
What does TSH do?
T3, T4, release form the thyroid
What does LH do?
Testosterone release form testis, E2 and Progesterone release from ovary
What does FSH do?
Sperm or egg growth
What does PRL do?
Milk production
What does ACTH do?
Cortisol release form the adrenal gland
What does MSH do?
Skin pigmentation
What are the stress hormones?
Epi: immediate Glucagon: 20 mins Imsulin: 30 mins ADH: 30 mins Cortisol: 2-4hrs GH: 24hrs
What does ADH do?
Concentrates urine
What is diabetes insipidus?
Too little ADH=> urinate a lot
What is Central DI?
Brain not making ADH
What is nephrogenic DI?
Blocks ADH receptor, can be caused bi Li and Domecocycline
What does water deprovation test tell you?
Water deprivaton=> DI
Fails to concentrate urine
What does giving DDAVP tell you?
DDAVP=> central DI
concentrates >25%
What is SIADH.
Too much ADH=> expand plasma vol=> pee Na
What is defference between DI and SIADH?
DI has dilute urine
SIADH has concentrated urine
What is psychogenic polydipsia?
Pathologic water drinking => low plasma osmolarity
What does Aldosterone do?
Reabsorbs Na, secretes H/K
What is Neuroblastoma?
Adrenal medulla tumor in kids, dancing eyes and feet, secretes catecholamines
What is Pheochromocytoma?
Adrenal medulla tumor in adults, 5 P’s
What does the zona glomerulosa make?
Aldosterone
What does the zona fasciculata make?
Cortisol
What does the zona reticularis make?
Androgens
What is Conn’s sydrome?
High aldo (tumor), Captopril test makes it worse
What does ANP do?
Inhibits Aldo, dilated renal artery (afferent arteriole)
What does Calcitonin do?
Inhibits osteclasts=> low serum Ca
What is MEN I?
Wermers: pancreas, pituitary, parathyroid adenoma (high gastrin)
What is MEN II?
Sipple’s: pheo, medullary thyroid cancer, PTH