Endocrine System Flashcards
endocrine system
one of the two main controlling systems of the body (along with nervous system)
hormones
regulatory substances secreted by glands
are endocrine glands ducts?
NO! They are ductless glands because they secrete to the bloodstream
target tissue
specific tissue that is influenced by a specific hormone
have specialized receptors
steroid hormones
made from lipids
found in
- gonads
- cortex of adrenals
what are hormones made of?
predominately amino acids
lipids
how are hormones controlled
negative feedback!
self-regulating
Pituitary gland other name
hypophysis
where is pituitary gland
beneath the brain
- anterior portion (adenohypophysis)
- posterior portion (neurohypophysis)
what controls the pituitary
hypothalamus (part of endocrine and nervous systems)
HOMEOSTASIS
growth hormone
produced by pituitary
SOMATOTROPIN
growth
how many hormones does the anterior pituitary produce
6
TSH
thyroid stimulating hormone
found in anterior pituitary
ACTH
adrenocorticotropic hormone
stimulates adrenal cortex
found in anterior pituitary
FSH
follicle-stimulating hormone
stimulates gonadal growth
anterior pituitary
LH
luteinizing hormone
development of corpus luteum at site of ruptured ovarian follicle; testosterone secretion
anterior pituitary
PRL
prolactin
milk secretion
anterior pituitary
what hormone are secreted in the anterior pituitary
Growth hormone GH
TSH thyroid stimulating hormone
ACTH adrenocorticotropic hormone
FSH follicle-stimulating hormone
LH luteinizing hormone
PRL prolactin
ADH
antidiuretic hormone
vasopressin
water reabsorption in kidneys, blood vessel constriction
posterior pituitary
oxytocin
uterine contraction, milk ejection from mammary glands
posterior pituitary
what hormones are secreted in the posterior pituitary
ADH antidiuretic hormone
oxytocin
thyroxine
T4 (tetraiodothyronine)
T3 (triiodothyronine)
increases metabolic rate and heat, influences physical and mental activities, normal growth
thyroid
what hormones are found in the thyroid
thyroxine (T4 and T3)
PTH
parathyroid hormone
calcium exchange btw blood and bones, increases Ca in blood
parathyroid gland
what hormones are found in parathyroid
PTH parathyroid hormone
calcium exchange
cortisol
metabolism of macromolecules, stress active
adrenal cortex
aldosterone
regulates electrolytes and water balance
adrenal cortex