Endocrine Flashcards
define GLAND
group of specialized epithelial cells producing secretions
define EXOCRINE GLANDS & give examples
secrete hormones into ducts (ex: salivary, mmmary, sweat)
define HORMONES
chemical messengers from endocrine glands that affect almost every organ & cell
describe ENDOCRINE GLANDS
don’t have ducts so release hormones into blood streams; 13 glands of this type
describe PITUITARY GLANDS
pea-sized gland that hangs below hypothalamus that control activity of other endocrine gland & responds to stimuli from neurohormones secreted by hypothalamus; 2 parts (posterior & anterior)
define ADRENOCORTICOTROPIC HORMONE (ACTH)
hormone of anterior pituitary that controls cortisol production
define FOLLICLE-STIMULATING HORMONE (FSH)
hormone of anterior pituitary controlling estrogen secretion, ova growth, & sperm production
define GROWTH HORMONE (GH)
hormone of anterior pituitary growth of bone, muscle, body & development
define LACTOGENIC HORMONE (LTH)
hormone of anterior pituitary stimulate & maintain breast milk & breast development
aka: lactogenic hormone
prolactin
define LUTEINIZING HORMONE (LH)
hormone of anterior pituitary control ovulation & testosterone
define MELANOCYTE-STIMULATING HORMONE (MSH)
hormone of anterior pituitary increase production of melanin & generally high in pregnancy
define THYROID-STIMULATING HORMONE (TSH)
hormone of anterior pituitary that stimulate & regulate thyroid function
describe ANTIDIURETIC HORMONE (ADH)
hormone of posterior pituitary secreted by hypothalamus & stored in pituitary, lower water excretion thru kidneys leading to blood pressure & constricts blood vessels
define OXYTOCIN (OXT)
hormone of posterior pituitary that control birth contractions, controls postnatal hemorrhage, & stimulate milk release
define PITOCIN
synthetic oxytocin
aka: pineal gland
pineal body
define MELATONIN
regulate circadian rhythm
define THYROID GLAND
either side of larynx below thyroid cartilage to regulate metabolism, growth, function of nervous system
list hormones of pituitary
- adrenocorticotropic hormone
- follicle-stimulating hormone
- growth hormone
- lactogenic hormone
- luteinizing hormone
- melanocyte-stimulating hormone
- thyroid-stimulating hormone
- antidiuretic hormone
- oxytocin
describe THYROXINE (T4)
hormone of thyroid; controls metabolism & temperature
describe TRIIODOTHYRONINE (T3)
hormone of thyroid; control metabolism & temperature & is more powerful than T4; rate of secretion controlled by TSH
describe CALCITONIN
hormone of thyroid; works w/parathyroid hormone that lowers calcium in blood/tissue by moving into bone
list hormones of thyroid
thyroxine, triiodothyronine, calcitonin
define PARATHYROID GLANDS
size of grain of rice in posterior surface of thyroid gland
define PARATHYROID HORMONE (PTH)
increase blood calcium levels via breakdown of bone
define THYMUS
near midline in anterior thoracic to develop immune before brith & during childhood & slowly turns into fat
define THYMOSIN
turns mature lymphocytes into T cells
define PANCREAS
feather shaped organ posterior to stomach
define PANCREATIC ISLETS
part of pancreas w/endocrine function that controls blood glucose & glucose metabolism
define GLUCOSE
basic form of energy
define GLUCAGON
secreted by alpha cells in pancreas to respond to low levels of glucose by telling liver to convert glycogen into glucose to increase blood glucose
define INSULIN
secreted by beta cells in pacnreas to respond to low blood sugar levels
list hormones of pancreas
pancreatic islets, glucose, glucagon, insulin
aka: adrenal glands
suprarenals
define ADRENAL CORTEX
outer portion of adrenal gland
list hormones of adrenal cortex
androgens, estrogen, progestin, corticosteroids, mineralocorticoids (aldosterone & deoxycorticosterone), glucocorticoids (cortisol & cortisone)
define CORTICOSTEROIDS
steroid hormone from adrenal cortex
define MINERALOCORTICOIDS
group of hormones balance fluid & electrolyte levels
describing ALDOSTERONE
corticosteroid (of mineralcorticoids) of the adrenal cortex regulating fluid balance, blood pressure, & electrolyte concentrations (increase Nareabsorption & K excretion)
define DEOXYCORTICOSTERONE
building block for ALD secreted by adrenal cortex
define GLUCOCORTICOIDS
group of hormones secreted by adrenal cortex metabolize carbs, proteins, & fats
define CORTISOL
glucorticoid that is an antinflammatory corticosteroid that regulates blood glucose levels & metabolism
aka: cortisol
hydrocortisone
define CORTISONE
glucocorticoids that regulate blood glucose levels
define ADRENAL MEDULLA
middle portion of adrenal gland secreting epinephrine & norepinephrine
describe EPINEPHRINE
hormone of adrenal medulla stimulate sympathetic nervous & intensify stress & trigger 4Fs; increases bpm, BP, & respiration; liver releases glucose & limites insulin
describe NOREPINEPHRINE
adrenal hormone and sympathetic neurohormone that preps body for stress response by acting as vasoconstrictor by increasing BP, strengthens heart beat, & stimulates muscle contractions
define ELECTROLYTES
mineral substances in bodily fluids (Ca, chloride, magnesium, phosphorous, sodium, & potassium)
define GONADS
glands that produce gametes & develop & maintain secondary sex
describe PUBERTY
time for maturing of genital organs & development of secondary sex traits; 12 yrs for girls & 11 for boys
define PRECOCIOUS PUBERTY
early onset puberty before 8 in girls & 9 in boys
define ESTROGEN
secreted by ovaries to develop secondary sex & menstrual regulation
define PROGESTERONE
released during 2nd half of cycle from corpus luteum in ovary to complete prep of uterus & maintain pregnancy
define GONADOTROPIN
any hormone that stimulates gonads; produced by gonads
describe ANDROGENS
sex hormones secreted by gonads, adrenal cortex, & fat cells; primarily composed of testosterone to develop & maintain male characteristics
define TESTOSTERONE
steroid hormone from testicles & adrenal cortex to develop male secondary sex & sperm production
define STEROIDS
large family of hormones derived from cholesterol that relieve swelling & inflammation (estrogen, testosterone, cortisol, etc)
describe ANABOLIC STEROID
man-made chemically related male sex hormone to treat hormone issues in men & replace muscle mass lost from disease
name some hormones fat cells secrete
leptin & ghrelin
describe LEPTIN
hormone secreted by fat cells & regulate appetite by acting on hypothalamus to suppress appetite & burn fat
define GHRELIN
hormone secreted by fat cells & made in GI tract responsible for hunger
define NEUROHORMONES
produced & released by neurons in brain rather than endocrine glands via blood stream
define ADENITIS
inflammation of gland
define ADENOCARCINOMA
malignant tumor originating in glands & can spread
describe MESENTERIC ADENITIS
inflammation of lymph nodes in abdomen; s/s: similar to appendicitis
define APPENDICITIS
inflammation of appendix bc of blockage leading to infection
define ADENOMA
benign tumor start in epithelial tissue
define ADENOSIS
any disease/condition of gland
describe ACROMEGALY
rare abnormal enlargement of hands, feet, & face from malfunction of hypothalamus/anterior pituitary leading to excess GH after puberty
define GIGANTISM
abnormal growth of entire body from excessive growth hormone before puberty
define HYPERPITUITARISM
excess secretion of growth hormone causing acromegaly & gigantism
define HYPOPITUITARISM
pituitary gland doesn’t make enough GH
define PITUITARY ADENOMA
slow growing & benign tumor
aka: pituitary adenoma
pituitary tumor
define FUNCTIONAL PITUITARY TUMORS
make lots of hormones unregulated (ACTH, growth, prolactin, TSH)
define GALACTORRHEA
excess prolactin causes milk to be produced to spontaneously
define PROLACTINOMA
benign functional pituitary tumor where the pituitary makes too much prolactin causing infertility in women, erectile dysfunction, & vision impairment
describe DIABETES INSIPIDUS
not related to diabetes mellitus & uncommon; not enough ADH or kidneys can’t respond to ADH so the resulting imbalance of fluid leads to extreme thirst & frequent pee