Endocrine System Flashcards
main function of endocrine system
maintain homeostasis
regulates and controls: (7)
▫growth ▫development ▫secondary sexual characteristics ▫how body uses energy ▫levels of salts/sugars in blood ▫volume of fluid in body ▫appetite
master gland
pituitary
pituitary is controlled by
hypothalamus
anterior pituitary hormones (6)
▫prolactin ▫growth hormone ▫adrenicorticotropin ▫thyroid stimulating hormone ▫lutenizing hormone ▫follicle stimulating hormone
prolactin
stimulates milk production after childbirth
growth hormone
▫stimulates growth in childhood
▫maintains muscle/bone mass and controls fat distribution in adults
adrenocorticotropin
stimulates adrenal glands
thyroid stimulating hormone
stimulates thyroid
luteinizing hormone
regulates sex hormones
follicle stimulating hormone
▫promotes sperm production in males
▫promotes ovulation in females
posterior pituitary hormones
▫oxytocin
▫antidiuretic hormone
oxytocin
▫causes milk let down during nursing
▫causes contractions during childbirth
thyroid hormones
▫T4
▫T3
▫calcitonin
T3 and T4
increase the rate at which cells release energy from carbohydrates
calcitonin
takes calcium out of blood and into bones
parathyroid hormone
takes calcium from the bones to make it available in the blood
adrenal hormones
▫adrenaline
▫aldosterone
▫cortisol
adrenalin (epinephrine)
increases heart rate, breathing rate, and blood pressure
aldosterone
helps kidneys conserve sodium and excrete potassium to maintain blood pressure
cortisol
keeps blood glucose levels stable
pancreatic hormones
▫insulin
▫glucagon
glucagon
▫stimulates liver to breakdown glucose
▫ raises blood sugar levels
insulin
▫stimulates cells to take in more glucose
▫lowers blood sugar levels
pineal gland hormone
melatonin
melatonin
maintains the circadian rhythm
where is the pineal gland located
between the cerebral hemispheres
thymus gland hormone
thymosins
thymosins
important in immune function
reproductive hormones
▫testosterone
▫progesterone
▫estrogen
endocrine glands
release chemicals directly into blood stream
exocrine glands
release chemicals onto surface of body or tissue
merocrine secretion
hormones released by vessicles
apocrine secretion
small portion of the cell are pinched off and lost to secrete hormone
holocrine secretion
large portions of the cell are lost to secrete hormone and cell dies
target cells
the cells that a particular hormone works on
Belgian blue breed
breed of cattle that has suppressed production of myostatin
myostatin
inhibits muscle growth
too small of a pituitary
▫too little GH
▫dwarfism
too big pituitary
▫too much GH
▫gigantism
goiters
▫swelling of the thyroid caused by lack of iodine
▫hypothyroidism
iodine is found in
▫seafood
▫iodized salt
graves disease
▫caused by hyperthyroidism
▫enlargement of thyroid, eye bulging, heat intolerance, anxiety
Cushing disease
▫hyperadrenocorticism
▫increased thirst and urination, increased hunger, round red face, fat upper body with skinny limbs
addisons disease
▫undersecretion of cortisol
▫low bp, increased pigmentation, weight loss, extreme fatigue
precocious puberty
▫when puberty begins before 8 in girls and before 9 in boys
diabetes results from
an insulin deficiency
type 1 diabetes
▫insulin dependent
▫autoimmune disease that attacks pancreatic cells
type 2 diabetes
▫adult onset
▫caused by weight
hyperglycemia
blood sugar rises
hypoglycemia
blood sugar is too low
gestational diabetes
when pregnancy hormones block insulin from doing its job
diabetic neuropathies
family of nerve disorders caused by diabetes
anabolic steriods
synthetic hormones that are similar to androgens
androgens
male sex hormones
how tall was the tallest man
8ft 11
what gland regulates metabolism
thyroid
what are corticosteroids used to treat
inflammation