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Endocrine system intro
introduction to the endocrine system
113
Nursing
Undergraduate 1
01/29/2023

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Term
the exocrine glands pass secretions through _______ that empty outside the _________ or into the ________ or opening of other organs
Definition
duct/tubes, body, lumen
Term
hormones are responsible for important functions r/t
Definition
reproduction, fluid and electrolyte balance, host defenses, responses to stress and injury, energy metabolism, and growth and development
Term
the maintenance of physiologic stability despite the constant changes that occur in the environment
Definition
homeostasis
Term
a hormone is a substance composed of
Definition
amines, peptides or steroids
Term
regulation of endocrine activity is controlled by mechanisms called
Definition
feedback mechanisms
Term
feedback mechanisms either ____________ hormone synthesis and secretions
Definition
stimulate or inhibit
Term
feedback mechanisms are triggered by _______ of specific substances
Definition
blood levels
Term
feedback may be
Definition
positive or negative
Term
in negative feedback high levels of a substance ______ hormone synthesis and secretion whereas low levels ______ hormone sythesis and secretion
Definition
inhibit, stimulate
Term
in positive feedback, high levels of a substance _________ hormone synthesis and secretion whereas low levels ____ hormone synthesis and secretion
Definition
stimulate, inhibit
Term
three basic secretion patterns of hormones
Definition
circadian or diurnal patter, pulsatile and cyclic patters, patterns that depend on levels of circulating substances
Term
the pituitary gland is also called the
Definition
hypophysis
Term
the pituitary gland is connected to the hypothalamus by the _____________
Definition
infundibular stalk
Term
the large lobe of the pituitary gland is the
Definition
anterior lobe
Term
the anterior lobe is also called the
Definition
adenohypophysis
Term
the hormones of the pituitary
Definition
growth hormone, adrenocorticotropic hormone, thyroid stimulating hormone, follicle stimulating hormone, luteinizing hormone, prolactin, melanocyte stimulating hormone
Term
stimulates the growth and development of bones, muscles and organs
Definition
growth hormone
Term
GH stimulates the release of ______ , by the liver and other tissues
Definition
insulin like growth factor 1
Term
IGF-1 promotes
Definition
tissue growth
Term
growth hormone is also called
Definition
somatotropic horomone
Term
controls the growth, development, and function of the cortex of the adrenal glands
Definition
adrenocorticotropic hormone
Term
adrenocorticotropic hormone controls release of _______ necessary for secretion of _______ but does not control rate of aldosterone secretion
Definition
glucocorticoids and adrenal androgens, aldosterone
Term
controls the secretory activities of the thyroid gland
Definition
thyroid stimulating hormone
Term
TSH is also called
Definition
thyrotropic hormone
Term
follicle stimulating hormone stimulates the development of the _________ in the ovaries and _______ in the woman, stimulates ________ in men
Definition
egg, estrogen production, sperm production
Term
luteinizing hormones controls __________ and ________ or egg release in the woman, controls _______ and testosterone production in men
Definition
progesterone production, ovulation, testicular growth
Term
stimulates breast milk production in women
Definition
prolactin
Term
prolactin is also called
Definition
lactogenic hormone
Term
the smollar lobe of the pituitary is know as the
Definition
posterior pituitary
Term
posterior pituitary is sometimes referred to as the
Definition
neurohypophysis
Term
causes the reabsorption of water from the renal tubules of the kidney
Definition
antidiuretic hormone
Term
causes contractions of the uterus in labor and the release of breast milk
Definition
oxytocin
Term
the posterior pituitary produces
Definition
ADH, oxytocin
Term
a pair of small, highly vascularized, triangular-shaped organs
Definition
adrenal glands
Term
the adrenal gland itself is composed of the outer portion called the ____ and the inner portion called the ____
Definition
cortex, medulla
Term
the adrenal medulla contains
Definition
sympathetic ganglia and secretory cells
Term
stimulation of the _______ causes the medulla to secrete two types of ______
Definition
sympathetic nervous system, catecholamine
Term
the two types of catecholamines
Definition
norepinephrine, epinephrine
Term
catecholamine effects vary depending on the _______ in the cell membrane
Definition
specific receptor
Term
the multiple adrenergic receptors
Definition
alpha1, alpha2, beta1, beta2 receptors
Term
norepinephrine binds to _____ receptors
Definition
alpha-adrenergic receptors
Term
epinephrine primarily effects _______ receptors
Definition
beta-adrenergic receptors
Term
the major function of catecholamines is
Definition
adaptation to stress, and maintenance of homeostasis
Term
the cortex is essential for maintenance of ________ physiologic activities
Definition
life-sustaining
Term
the cells of the cortex have three zones
Definition
zona glomerulosa, zona fasciculata, zona reticularis
Term
the hormones synthesized and secreted by the cortex are known as
Definition
steroids
Term
steroids consist of
Definition
mineralocorticoids, glucocorticoids and androgens or estrogens
Term
the zona glomerulosa produces
Definition
mineralocorticoids
Term
the most abundant mineralocorticoid is
Definition
aldosterone
Term
mineralocorticoids play a key role in maintaining an adequate
Definition
extracellular fluid volume
Term
renin is produced by the _________ cells of renal______
Definition
juxtaglomerular cells, afferent arterioles
Term
Renin release is stimulated by,
Definition
decrease in extracellular fluid volume
Term
renin acts on plasma proteins to release _______ which is catalyzed in the _____ to ______
Definition
angiotensis I, lung, angiotensin II
Term
Angiotensin II stimulates the secretion of ________, which results in ________ retention
Definition
aldosterone, sodium and water
Term
glucocorticoids are produced by the
Definition
zona reticularis and fasciculata
Term
the most abundant and potent of the glucocorticoids is
Definition
cortisol
Term
approximately 92% of circulating cortisol is bound to
Definition
plasma protein
Term
free cortisol binds with receptors in the _________ of target cells
Definition
cytoplasm and nuclei
Term
cortisol has a _______ on other physiologic processes
Definition
permissive effect
Term
the functions of glucocorticoid functions include
Definition
control of carbs, lipid and fat metabolism, regulation of antiinflammatory and immune responses, and control of emotional states
Term
androgens are produced in the
Definition
zona fasciculata and reticularis
Term
the primary functions of androgens are
Definition
masculinization in men
Term
other sex hormones include
Definition
estrogen and progesterone
Term
in women estrogens are supplied by the
Definition
ovaries and adrenal glands
Term
in postmenopausal women the _______ is the primary source of _______ estrogen
Definition
adrenal, cortex, endogenous
Term
the thyroid gland is located in the
Definition
lower portion of the anterior neck
Term
the loves of the thyroid gland are connected in front of the trachea by a narrow bridge of tissue called the
Definition
isthmus
Term
the thyroid gland plays a major role in regulating the body's
Definition
rate of metabolism and growth and development
Term
when the metabolic rate falls, the ______ simulates the _______ gland to secrete ______-
Definition
hypothalamus, pituitary, TSH
Term
hormones produced by the thyroid gland
Definition
thyroid hormone, triiodothyronine, calcitonin
Term
thyroid hormone is also called
Definition
thyroxin, tetraiodothyronine, T4
Term
triiodothyronine is referred to as
Definition
T3
Term
Both T4 and T3 increase the
Definition
body's metabolic rate
Term
calcitonin or thyrocalcitonin plays a role in regulating
Definition
serum calcium level
Term
thyrocalcitonin is secreted when serum calcium levels are _____ limiting the shift of calcium from the _______ into the blood
Definition
high, bones
Term
the parathyroids function
Definition
independently
Term
the parathyroids secrete only ___ hormone which is _____
Definition
one, parathormone (PTH)
Term
parathormone plays a critical role in regulating _____
Definition
serum calcium level
Term
PTH increase the absorption of calcium from the _______ transfers calcium from the bones to the ________, and signals the kidneys to _____ calcium
Definition
intestines, blood, conserve
Term
In general, calcium retention by the kidneys is balanced by
Definition
phosphate loss
Term
In healthy older adults, endocrine functio usally remains
Definition
adequate
Term
changes in older adult when homeostasis is altered by illness
Definition
diminished, response to ADH, decline in GH and IGF-1, decline in cortisol secretion, hypothyroidism
Term
Decline in GH and IGF-1 results in
Definition
reduced protein synthesis, decreased lean body and bone mass, and reduced immune function
Term
Decline in cortisol secretion is usually balanced by
Definition
decreased cortisol metabolism
Term
Decline in secretion of aldosterone and plasma renin activity decreases
Definition
the efficiency of sodium conservation and adaptation to position changes
Term
Because hormones affect all body tissues, pt with endocrine disorder often report vague symptoms such as
Definition
fatigue, headach, or weight changes
Term
An exploration for the patient's concerns may reveal more specific data such as changes in
Definition
energy level, weight, height, appearance, skin color, sleep patter, sexual function, urinary function
Term
These symptoms my also be noted in present health assessment
Definition
GI disturbances, problems with vision, mental/emotional changes, musculoskeletal symptoms
Term
A history of _________ should be documented
Definition
DM, brain tumors, head trauma, CNS infection, vascular disorder, renal calculi, chronic renal failure, tuberculosis, hypothyroidism as well as disease of the pancreas, liver or bone
Term
in a functional assessment, determine whether the patient has had
Definition
sleep disturbances or changes in appetite
Term
examine the eyes for
Definition
exophthalmos
Term
exophthalmos means
Definition
eye bulging
Term
a spasm of the facial muscl when the face is tapped over the facial nerve
Definition
chvostek sign
Term
carpopedal spasm that occurs when a BP cuff is inflated above the patients systolic BP and left in place for 2-3 min
Definition
trousseaus sign
Term
These radiographic studies may be used to detect structural abnormalities
Definition
conventional radiographs, computed tomography, MRI
Term
Radiographic studies are used to detect anomalies of the
Definition
pituitary, adrenals, thyroid, parathyroid glands and the pancreas
Term
Angiography may reveal the presence of _____ anomalies associated with ______ disorders
Definition
vascular, pituitary or adrenal
Term
radiopaque dye is injected into the arteries
Definition
angiography
Term
ultrasound is useful in assessing
Definition
adrenal, thyroid and parathyroid conditions
Term
for a thyroid scan pt ingests _____
Definition
radioactive iodine
Term
Thyroid scan imagining aids in diagnosing cancer because the patterns of iodine concentration in
Definition
normal and malignant tissue are different
Term
radioimmunoassay and ELISA are tests that measure levels of
Definition
hormones in the blood
Term
ELISA
Definition
enzyme linked immunosorbent assay
Term
Hormone reserve activity can also be measured using a number of ________
Definition
suppression or stimulation tests
Term
The response of stimulation tests helps the physician to determine whether the _______ or the _______ regulatory mechanism is responsible for abnormal hormone levels
Definition
target gland, hypothalamic pituitary
Term
A GH suppression test may be done by measuring, ________ levels before and after a dose of ______
Definition
blood glucose, glucose
Term
In a GH suppression test the glucose will suppress GH levels through
Definition
negative feedback system
Term
In normal pt a GH suppression test will cause GH levels to fall less than
Definition
5 mg/ml
Term
a 6 hour water deprivation test is done to determine the cause of
Definition
diabetes insipidus
Term
In a 6 hour water deprivation test, _____ is administered and ______ are taken at intervals
Definition
ADH, urine and blood samples
Term
the most useful tests of thyroid function are measurements of serum
Definition
TSH and T4
Term
The thyroid gland uses ______ to manufacture hormones
Definition
iodine
Term
the amount of iodine taken up by the thyroid is measured to assess the activity level of the gland
Definition
RAI uptake test
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