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Secrete chemicals called hormones into the ECF then hormones enter the bloodstream, circulate throughout body looking for targets/receptors
Regulate metabolism. Specialized chemical messenger, produced/secreted by endocrine tissue/organ, circulates thru body fluids altering cellular activity via specific receptor
Lipid soluble hormone
Steroids (aldosterone, cortisol, calcitrol, testosterone, estrogen & progesterone), T3T4, NO
Affects of Hormonal Action
Alters cellular activity, May produce: changing permeability, synthesis of proteins, lipids, or other molecules enzymes, hormones, altering metabolic rxns, stimulating transport of subst in/out of target cell, stimulate mitosis, stimulate contraction of smooth & cardiac muscle
Secretion from one endocrine organ/tissue target to another causing secretions of other hormones (hormone to hormone)
monitoring of body fluids (hormone to body fluid); PTH, Calcitonin, Calcitriol, Insulin/Glucagon
3 Hormone Categories produced by Adrenal Cortex
Mineralcorticoids (aldosterone), Glucocorticoids (cortisol) & Gonadocorticoids (sex hormones)
What is the response of ACTH?
Increases cortisol which causes masked inflammation, inhibits basophils, decreases stress
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