Test 3 Endocrine Flashcards
Function of endocrine glands
synthesize, store, and release hormones into blood
Hormones of the Hypothalamus gland and their target cells
Thyrotropin-releasing TRH
Corticotropin-releasing CRH
Anterior pituitary
Hormones of the anterior pituitary gland and their target cells
Adrenocorticotropic ACTH Adrenal cortex
Thyroid-stimulating TSH thyroid
Hormones of the posterior pituitary and their target cells
Antidiuretic(vasopressin) ADH
kidney
Hormones of the thyroid gland and their target cells
Thyroxine T4
triiodothyronie T3
systemic cells
Hormones of the adrenal cortex and their target cells
mineralcorticosteroids (aldosterone) kidneys
Glucocorticoids (cortisol) most tissues
Hormones of the pancreas and their target cells
insulin
muscles, tissues
problems that occur when their is lack of negative feedback inhibition
excessive hormone production
Failure of “turn off” system
Gland destruction (infection, tumor compression, autoimmune attack) Hormone production genetic defect (gene deletion/mutation, enzymatic deficit) EX: DM, congenital adrenal hyperplasia
Hormone deficiency
Gland overproduction, nonendocrine tissue or tumore production
EX: cushings syndrome, anabolic steroid abuse, Graves disease
hormone excess
Aberrant increase in hormone level which causes a decrease in available receptors
EX: DM, type 2
hormone resistance
ADH insufficiency
Diabetes insipidus
3 types of diabetes insipidus
Neurogenic
Nephrogenic
Dipsogenic
Insufficient amounts of ADH
Lesion of hypothalamus, pituitary stalk, posterior pituitary
Neurogenic
Inadequate response to ADH
Genetic or acquired
nephrogenic
decrease in plasma osmolarity- below threshold
Excessive fluid intake
Dipsogenic
RX for neurogenic DI
ADH replacement (synthetic vasopressin)
RX for nephrogenic DI
reverse underlying disorder
Replace electrolytes
Thiazide in moderation
Lab tests for DI
urine specific gravity 300
Excess ADH secretion which leads to H2O intoxication and hyponatremia
Syndrome of inappropriate antidiuretic hormone SIADH
Lab test for SIADH
serum Na
inadequate production of TH or hormone resistance
hypothyroidism
Lack of TH negative feedback on pituitary TSH secretion and hypothalamic TRH secretion
LOw levels of TH and high elves of TSH and TRH
primary thyroid malfunction
Lack of negative feedback to hypothalamic release of TRH by TSH and thyroid TH
Low levels of TSH and TH and high levels of TRH
pituitary malfunction