CH 12: Endocrine System Flashcards
Define Antidiuretic
An agent that decreases urine production (hormone)
-ic = pertaining to
anti- = against
di- = complete
-uret- = urination
Define Endocrine (Glands)
Literally to secrete within;
refers to glands that secrete their chemical messengers internally and directly into the bloodstream
endo- = within
-crine, crin/o- = secrete
Define Endocrinology
Medical specialty concerned with the production and effects of hormones
-logy = study of
endo- = within
-crine, crin/o- = secrete
Define Endocrinologist
A medical specialist in endocrinology
-logist = medical specialist, one who studies
endo- = within
-crine, crin/o- = secrete
Define Hormone
Chemical messengers of the endocrine system secreted directly into the blood stream.
form in one tissue or organ and carried by the bloodstream to stimulate or inhibit a function of another tissue or organ
hormon- = hormone (to set in motion in Greek)
Define Hypothalamus
ENdocrine gland that lies below the thalamus (produces two hormones)
hypo- = below, less than
-thalam/o- = thalamus
Define Melatonin
Hormone formed by the pineal gland that regulates the sleep-wake cycle known as “Circadian Rhythm.”
-in = substance, chemical, compound
mela- = black
-ton- = tension, pressure
Define Circadian Rhythm
A physical, mental, and behavioral change that follow a daily cycle.
Define Oxytocin
Pituitary hormone that stimulates the uterus to contract in childbirth and contractions of breast tissue for lactation.
-in = substance, chemical, compound
oxy- = oxygen
-toc- = labor and childbirth
Define Pineal
Responsible for regulating the body’s sleep-wake cycle (circadian rhythm)
Define Pineal Gland
A gland in the brain that secretes melatonin.
Pertaining to the pineal gland.
Define Pituitary
Pertaining to the pituitary gland.
-ary = pertaining to
pituit/o- = pituitary
Define Pituitary Gland
The “master gland” of the endocrine system that regulates much of the control over other endocrine glands, influencing production of hormones in other endocrine glands.
-ary = pertaining to
pituit/o- = pituitary
Define Hypertension
Condition of excessive or persistent high arterial blood pressure.
-ion = process, action
hyper- = excessive
-tens- = pressure
Define Hypotension
Excessive or persistent low arterial blood pressure
-ion = process, action
hypo- = low, less than
-tens- = pressure
What is Normal Blood Pressure for adults?
an average of 120/80 (120 over 80)
increase = increase in pressure
decrease = decrease in pressure
Define Bradycardia
slow heart rate
(<60 beats/min in an adult)
-ia = condition
brady- = slow
cardi- = heart
Define Tachycardia
fast heart rate
(>100 beats/min in an adult)
-ia = condition
tachy- = fast
cardi/o- = heart
Define Hyperpituitarism
excessive secretion of one or more hormones produced by the pituitary gland
Define Hypopituitarism
insufficient secretion of one or more hormones produced by the pituitary gland
Define Acromegaly
Enlargement of the head, hands, and feet due to excess growth hormone after puberty
-megaly = abnormal enlargement
acr/o- = peak, highest point
Define Gigantism
Abnormal growth (height + size) due to an overproduction of growth hormone in children before puberty
Define Adrenocorticotropic
hormone of anterior pituitary that stimulates the cortex of the adrenal gland to produce its own hormones.
-tropic = turning, change
adren/o- = adrenal gland
cortic/o- = cortex
Define Corticosteroid
hormone produced by the adrenal cortex
-steroid = steroid
cortic/o- = cortex
Define Cortisone
“stress hormone” produced by adrenal cortex
-one = hormone
cortis- = from the cortex
Define Gonadotropin
Stimulates the production of testosterone and estrogen
-tropin = stimulate
gonad/o- = testis, ovary
Define Gonad
An organ that produces sex cells;
a testis or an ovary
gonad/o- = gonad (seed in Latin)
Define Hydrocortisone
Potent glucocorticoid used to suppress inflammation (also called Cortisol)
-one = hormone
hydr/o- = water
-cortis- = from the cortex
Define Prolactin
Pituitary hormone that stimulates the production of milk
-in = substance, chemical, compound
pro- = before
-lact, lact/o- = milk
Define Somatotropin
Hormone of the anterior pituitary that stimulates the growth of body tissues
aka growth hormone
-tropin = stimulate
somat/o- = the body
Define Adenoma
A benign neoplasm of epithelial tissue
-oma = tumor
aden-, aden/o- = gland, node
Define Calcitonin
Hormone produced by the thyroid gland that moves calcium from blood to bones
-in = substance, chemical, compound
-calc/i- = calcium
-ton- = tension, pressure