Ch. 17

among their many functions, hormones regulate

- blood volume - cellular concentration - # of platelets

endocrine glands are

- ductless glands - the organs of the endocrine system - secrete hormones directly into the bloodstream - help maintain homeostasis

what are some characteristics of the endocrine system?

- reaction time: slow = seconds to hours - duration of response: long-lasting = minutes to weeks

thyroid hormone is somewhat unique in that it is a

biogenic amine that is lipid soluble

which type of hormone requires a carrier protein in the blood?

lipid soluble

eicosanoids

lipids synthesized from the fatty acid chains of phospholipids found in plasma membrane

eicosanoids are a primary type of

local hormone

compared to the nervous system, the endocrine system has?

more widespread & long-lasting effects

most hormones are made of chains of amino acids & are therefore

proteins

protein hormones are

water soluble