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Nursing Concepts For Acute Care (NURS 303) Lecture notes Ch 47, 49

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Endocrine assessment – Lecture notes Ch 47, 49

California State University Chico

Nursing Concepts for Acute Care (NURS 303)

Ch. 47 Endocrine system
Functions of the endocrine system
1. controls and regulates target cells or organs
2. released directly into circulation or have local effect
3. Reproductive, CNS development (fetus)
4. Stimulates growth and development
5. Sexual reproduction
6. Maintains homeostasis
7. Responds to emergency demands
Glandshormones (chemical substance that controls and regulates activity)
1. Hypothalamus releases substances that stimulate/inhibit hormones from the
pituitary gland
a. CRH, TRH, GHRH, GnRH, PRF
b. somatostatin inhibits growth hormone, prolactin-inhibiting factor
2. Pituitary
a. anterior (80% of pituitary weight)
i. 6 tropic hormones
ii. controls secretion of other hormones
b. posterior
Anterior
(adenohyposhysis)
GHall cells
TSHthyroid
ACTHadrenal
cortex
FSHreproductive
organs
LHrepro organs
MSHmelanocytes
in skin
Prolactinovaries,
mammary glands,
testes
Growth, tissue repair
Stimulates synthesis and release of
thyroid hormones
Stimulates secretion of corticosteroids
Stimulates sex hormone secretion,
reproductive organ growth, processes
Stimulates ovulation in women and
secretion of sex hormones
Increases melanin production to make
skin darker
Stimulates milk production, increases
response to LH, FSH, stimulates
testicular function in men
Posterior
(neurohyposhysis)
Oxytocinuterus,
mammary glands
ADH
(vasopressin)renal
tubules, vascular
smooth muscle
Stimulates uterine contractility, milk
production
Promotes reabsorption of water from
renal tubules, vasoconstriction
 stimulated by plasma osmolality
and hypovolemia
3. Thyroid
a. Thyroxine (T4), T3all body tissues
i. regulates metabolic rate
b. calcitoninbone tissue
i. regulates calcium and phosphorus serum levels, decreases serum
calcium levels
4. Parathyroid
5. Adrenal
a. adrenal medullacatecholamines (epinephrine, norepinephrine,
dopamine) increases response to stress, prolongs effects of SNS
b. adrenal cortexsteroid hormones
i. corticosteroids (cortisol, hydrocortisone)all body tissues,
promotes metabolism, increased in response to stress, antiinflammatory
ii. androgens, estradiolreproductive organs; promotes growth
spurt in adolescents, secondary sex characteristics, libido
iii. mineral corticoids (aldosterone)kidneys; regulates sodium and
potassium balance (water balance)

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Nursing Concepts For Acute Care (NURS 303) Lecture notes Ch 47, 49

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