nervous systems is fast acting w/ rapid control whereas the endocrine takes a couple days due to hormones being transported to target organs via circulatory system
hormone: slow acting chemical messenger
hormone molecular groups are steroids and amino-acids
target cell: cells w/in an organ that respond to a particular hormone
specific cellularreceptors are needed in order for a hormone to take effect on a tissue
thyroid
located in anterior neck
produced key hormones for metabolism
hypothalamus
located in third ventricle
produces releasing hormones for anterior pituitary and produce hormones for posterior pituitary
pancreas
behind the stomach and close to small intestine
mixed gland that secretes insulin (beta cell) and glucagon (alpha cell)
testes
in scrotum
produces testosterone and sperm
pituitary
located in sella turcica of sphenoid bone
releases tropic hormones as well as non-tropic hormones
ovaries
female pelvic cavity
produces estrogen, progesterone, and ova
thymus
upper thorax, overlying heart
thymulin, thymosin and thymopoietin for T-cell and immunity
pineal gland
roof of third ventricle of brain
produces melatonin
stimulated by tropic hormone
ACTH
estrogen
T3/T4
testosterone
TSH
FSH
norepinephrine and epinephrine are stimulated by nervous system
humoral factor stimulated
calcitonin
parathyroid hormone
insulin
tetany is a result of low calcium levels, parathyroid hormone (PTH)
excessive urine output without high blood glucose levels, low ADH
loss of glucose in urine, low insulin
abnormally low stature w/ normal proportions, low GH
in adults: large bones of hands, feet and face, excessive GH