Pituitary Gland Fx Flashcards
what is the relationship between the hypothalamus and the pituitary gland?
the hypothalamus secretes releasing hormones to the anterior pituitary gland which will causes the synthesis of other hormones causing effects in the body after release. The hypothalamus also synthesizes vasopressin and oxytocin to then be sent to the posterior pituitary where they are stored until stimulated for release
the posterior lobe stores and releases what hormones?
vasopressin (ADH) and oxytocin
GHRH -> GH =
effects all organs:
promotes body tissue growth, stimulates proteogenesis, lipolysis and gluconeogensis ,inhibits cellular glucose uptake
CRH -> ACTH =
adrenal gland; stimulates cortisol release
TRH -> TSH =
thyroid gland; thyroid hormones
GnRH -> FSH and LH =
ovaries or testes; stimulates repro hormone production
PIH -> prolactin =
mammary glands; milk production
ADH stimulates what two things?
- kidneys: stimulates water reabsorption
- blood vessels: stimulates vasoconstriction
oxytocin stimulates what 2 things?
- uterus: stimulates uterine contraction
- mammary glands: stimulates milk ejection
deficiency of GH may result in __
dwarfism
hypoadrenocorticism (addisons) is primarily what?
reduced/absent cortisol by the adrenal gland
hyperadrenocorticism (cushings) is __ in 85% of cases
pituitary dependent/overproduction of ACTH
diabetes insipidus is a __ disorder where too much or too little __ or __ is produced
posterior pituitary, ADH or oxytocin
central diabetes insipidus is a __ in vasopressin while nephrogenic diabetes insipidus is __ to vasopressin
reduction or lack of; insensitive
how would you differentiate between central and nephrogenic diabetes insipidus?
measure the urine specific gravity then give exogenous vasopressin. If its nephrogenic then the kidneys will be insensitive and unable to concentrate the urine while with central they will be able to concentrate urine
