BIO 245 - Exam #1 Endrocrine System
Slides
Hormonal Stimulation - ANS-a gland cell releases its hormone in response to another
hormone binding to it
Humornal Stimulation - ANS-a hormone is released in response to changes in the blood
levels of a nutrient or ion
Nervous Stimulation - ANS-a hormone is released in response to direct nervous system
stimulation
Biogenic amines - ANS-1) water-soluble except for thyroid hormone
2) thyroid hormones, catecholamines (epinephrine, norepinephrine and dopamine)
melatonin
Peptides/Proteins - ANS-1) composed of amino acid chains
2) water-soluble
3) Antidiuretic hormone, GH, insulin and glucagon
Steroid - ANS-1) derivative of cholesterol, lipid-soluble
2) sex hormones (testosterone, estrogen, progesterone), cortisol, aldosterone
Elcosanoids - ANS-primary type of local hormone form from fatty acids within
phospholipid bilayer of membrane
Phospholipase C - ANS-Enzyme associated with the plasma membrane that generates
two small messenger molecules in response to activation.
releasing hormones - ANS-increase secretion of anterior pituitary hormones
inhibiting hormones - ANS-Decrease secretion of anterior pituitary hormones
Include: prolactin-inhibiting hormone (PIH) and growth-inhibiting hormone (GIH)
Prolactin - ANS-release triggered by PRH, inhibited by PIH (or dopamine) from
hypothalamus; stimulates milk production
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