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CH 45 Endocrine system
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Hormone
a regulatory chemical secreted into the blood by an endocrine gland or an organ exhibiting endocrine function
Neurohormone
a chemical messenger secreted into the blood by a nerve.
Paracrine
regulatory molecules work without being transmitted by the blood. affect neighboring cells
Pheromone
communication messengers in the outside environment
autocrine
signaling
the cell signals its self
3 chemical categories of Hormones
Peptides and proteins
amino acid derivative
steroids
characteristics peptides and proteins and the amino acid derivative groups
they are hydrophilic and must use surface receptors to communicate with cells
steroids are _____ soluble and can readily _____ cell membranes.
lipid ; cross
lipophilic
nonpolar = fat soluble
steroid hormones and thyroid hormones
bind to intracellular receptors
hydrophilic
polar= water-soluble
all other hormones
bind to extracellular receptors
_______ regulation occurs in most organs
paracrine
growth factors definition and 4 examples
growth factors are proteins that promote growth and cell division in specific organs
Epidermal growth factor- skin
Nerve growth factor- neurons
Insulin-like growth factor-bone
cytokines- immune system
nitric oxide
a gas paracrine regulator that promotes vasodilation
lipophilic hormones include the _______ hormones (derived from cholesterol) and the _____ hormones (tyrosine + iodine)
steroid ; thyroid
Author
Ivanneth
ID
260188
Card Set
CH 45 Endocrine system
Description
chapter 45 endocrine system notecards
Updated
2/4/2014, 3:24:37 PM
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