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Endocrine Disorders
Patho
Question | Answer |
---|---|
___ is from: congenital malformations, destruction from infection, ischemia, inflammation, autoimmune, and cancer, aging, and necessary hormone < | hypofunction |
___ is from: excessive stimulation, hyperplasia, and hormone secreting tumor | hyperfunction |
px originated with that particular gland | primary |
gland may be functioning; px originates with a def of a necessary hormone to function | secondary |
px is a result of hypothalmic activity | tertiary |
"master gland" | pituitary gland |
located at the base of the brain next to the hypothalmus | pituitary gland |
anterior pituitary secretes ____ (6 things) | ACTH, TSH, GH, FSH, LH, prolactin |
___ controls cortisol | ACTH |
___ controls thyroid hormone | TSH |
___ controls sex hormones | LH |
___ regulates fertility | FSH |
there are no s/s of hypopituitarism until ____ | 70-90% destruction |
____ def can be life-threatening b/c of its role with adrenal glane | ACTH |
what is the pattern of hypopituitarism? | GH, then LH and FSH, then TSH, and then ACTH last |
what are 4 things essential for growth and development? | GH, insulin, thyroid hormone, and androgens |
controls cell division and synthesis of protein | GH |
somatotropin | GH |
GH controls bone growth through ____ | IGF- insulin-like growth factors |
excessive amounts > glucose levels; < glucose being used for energy, uses protein and fat | > GH |
where is GH carried? | plasma |
ht is well below 5th% | short stature |
functional hypothyroidism + emotional deprivation | psychosocail dwarfism |
___ s/s: poor growth, potbelly, and poor eating/drinking habits | psychosocial dwarfism |
GH are normal, but have a defect in IGF production; rare | laron-type dwarfism |
has normal birth wt, normal intelligence, short stature, obesity, immature appearance, delay skeletal maturity and puberty | congential GH def |
soem causes of tall stature | genetic/chrom (Marfan's), >GH, early release of estrogen/androgen |
d/t excessive GH release prior to epiphyseal closure | gigantism |
often can reach 7-8ft tall and have acromegaly | gigantism |
what is the main cause of gigantism? | pituitary tumor |
> GH after epiphsis closure and is not very common | acromegaly |
what is the most common cause of acromegaly? | pituitary tumor |
___ s/s: large hands and feet, protrusion of hte lower jaw, coarse facial ft, HTN, CAD, CHF, enlarged adrenal thyroid, and parathyroid, HA, sweating, weakness | acromegaly |
located in the lower neck anterior to the trachea | thyroid |
produces, stores, and secretes hormones | thyroid |
responsible for cellular metabolism | T4- thyroxine |
responsible for regulating cellular metabolism | T3- triiodothyronine |
calcium regulation | thyrocalcitonin- calcitonin |
___ is necessary for the thyroid gland to synthesize and secrete hormones | iodine |
__ and ___ stimulate body growth, > metabolic rate, heart rate, and glucose | T3 and T4 |
acts on the kidneys and bones to < serum Ca levels | Calcitonin |
functional units of the thyroid | follicles |
increase in thyroid size or hypertrophy | goiter |
thyroid's attempt to compensate for inadequate TH | goiter |
results in a hypometabolic state including < metabolism, O2 consumption, and heat production | hypothyroidism |
what are the primary cause of hypothyroidism? | congenital defects, surgery, radiation, antithyroid meds, iodine def, and thyroditis |
what are the secondary causes of hypothyroidism? | peripheral resistance to thyroid hormones or pituitary TSH def |
___ s/s: memory impairment, edema, hypotension, goiter, wt gain, cold intolerance, bradycardia | hypothyroidism |
with hypothyroidism everying < except for ___ and ___ | wt and fluid |
accumulation of protein in the interstitial spaces resulting in > interstitial fluids and non-pitting edema; can also lead to dilated cardiomyopathy | myxedema (hypothyroidism) |
hypothyroid crisis | myxedematous coma |
results from exteme or prolonged hypothyroidism and is rare, but life-threatening | myxedematous coma |
hypermetabolic state | hyperthyroidism |
___ s/s: emotional liability, agitation, exophtalmos, > reflexes, tachycardia, diarrhea, muscle weakness, fatigue, flushed skin, goiter, hyperthermia, wt loss, heat intolerance, diaphoresis | hyperthyroidism |
in hyperthyroidism everything goes up except for __ | weight |
extreme state of hyperthyroidism- is life-threatening and seen in undx cases | thyroid storm |
most common in women under 40 and the cause is unknown. it is associated with the human leukocyte antigen | graves' disease |
ocular px is the most prevalent s/s, but smoking does make it worse | graves' disease |
located posterior to the thyroid | parathyroid |
maintain serum Ca bby secreting PTH, which > bone, kidney, and intestinal reaborption of Ca | parathyroid |
activation of ____ is enhanced in the kidneys by PTH | Vit D |
leads to hypocalcemia, hyperphosphatemia, hyperreflexia, and altered sensorium | hypoparathyroidism |
rare, familial disorder with PTH resisitance | pseudohypothyriodism |
leads to hypercalccemia, hypophosphatemia, bone damage, and renal damage | hyperparathyroidism |
in ___ see > bicard and < acid---leading to hypokalemia and metabolic acidosis | hyperparathyroidism |
located superior in each kidney | adrenal gland |
outer layer of the adrenal gland | cortex |
secretes mineralcorticoids (aldosterone), glucocorticoids (cortisol, testosterone, and estrogen) | adrenal cortex |
secretes epi, norepi, and dopamine | adrenal medulla |
inner layer of adrenal gland | medulla |
stimulates glucose production, < glucose in the tissue | glucose metabolism |
> plasma levels and breakdown of proteins | protein metabolism |
> mobilization and utilization of fatty acids | fat metabolism |
prevention of inflammatory mediators, suppressing immune response | anti-inflammatory action |
contributes to emotional instability | psychic effect |
facilitates humoral and neural influences | permissive effect |
chronic adrenal suppression with meds leads to ___ | atrophy |
autosomal recessive trait that effects both genders--- def of enymes necessary for the synthesis of cortisol | congenital adrenal hyperplasia |
___ leads to > levels of ACTH and mineralocoticoids | congenital adrenal hyperplasia |
___ s/s: abiguous genitalia, hyponatermia, hyperkalemia, vomiting, dehydration, shock | congenital adrenal hyperplasia |
rare, primary adrenal cortical insufficiency where the adrenal cortical hormones are < and ACTH is > | addison's disease |
chronic metabolic disease where all of the adrenal cortex is destroyed | addison's disease |
___ s/s: related to hormone def and ACTH elevation but do not become apparent until 90% adrenal destruction | addison's disease |
life-threatening---s/s include N/V, muscular weakness, hypotension, dehydration, vascular collapse | acute adrenal crisis |
hypercorticolism | Cushing's Syndrome |
what are the 4 forms of Cushing's syndrome? | cushing's disease, adrenal tumor, ectopic cushings, and iatrogenic |
excessive ACTH from the pituitary | Cushing's disease |
caused by a nonpituitary ACTH secreting tumor | ectopic cushing's |
cushings syndrom from that is from long-term glucocorticoid | iatrogenic |
___ s/s: neuro, CV, GI, MS, skin, renal, repriductive, metabolic PX | cushing's syndrome |
a lack of or inadequate secretion of insulin, or insulin resistance resulting from hyperglycemia | DM |
most common chronic endocrine disorder | DM |
___ works with the liver to maintain blood sugar levels | pancreas |
6-carbon molecule | glucose |
used especially bbyt he brain and the NS | efficient fuel |
describe the tract and process glucose takes when it enters the body | enters: GI tract, travels: the portal vien into th liver, liver sends: circulatory system, tissue retrieves it from bl strem |
how does the live adjust blood glucose levels | glycogen synthesis, glycogen breakdown, and synthesis for glucose from noncarbohydrate source (amino acids, lactic acids, triglycerides) |
3 sources of energy metabolism | glucose, fat, and protein |
the most efficient form of fuel storage | fat |
all cells but ___ and ___ use fat | brain and RBC |
where does the inital breakdown of fat occur? | liver |
what is fat released as? | ketones |
3/4 of the body's solids are __ | proteins |
__ are essential for genes, enzymes, muscles, bone, and Hgb | proteins |
building blocks | amino acids |
excess protein does not get stored as protein but as... | fat, ketones, or glucose |
secretes digestive juices into the duodenum | acini |
secretes glucose-regulating hormones into the blood | islets of langerhans |
acini and islets of langerhans are apart of the ___ | pancreas tissue |
islets of langerhans----synthesis and secretion of glucagon | alpha |
islets of langerhans----synthesis and secretion of insulin | beta |
islets of langerhans----secretes somatostain | delta |
inhibits the release of insulin and glucagon, < GI absorption, extends the use of nutrients by the tissues | somatostatin (secreted by delta of islets of langerhans) |
promotes glucose uptake by target cells and provides for glucose storage as glycogen | insulin |
prevents fat and glucose breakdown and inhibits gluconegenesis | insulin |
> protein synthesis | insulin |
> transport of glucose into fat cells | insulin |
facilitates trig synthesis from glucose in fat cells | insulin |
inhibits intracellular breakdown of stored trig | insulin |
binds to and activates a membrane receptor of the target cells | insulin |
cell membranes are impermeable to ___ so ___ must be actively transported in | glucose |
polypeptide molecule | glucagon |
> during hypoglycemic times and initates glucose release from the liver | glucagon |
maintain glucose during stress | catecholamine (epi and norepi) |
catecholamines | epi and norepi |
> protein synthesis and mobilizes fat from adipose | GH |
antagonizes insulin-> blood glucose | GH |
critical to survive starvation and fasting | glucocorticoid |
stimulates gluconegensis by the liver | glucocorticoid |
____ released during times of stress will > glucocorticoid | cortisol |