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Endocrine System
- chemical communication system
- sends chem. messages- hormones
- sent through the blood stream
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Hormones
- chemical substance
- carry messages through body in blood
- metabolism, growth, reproduction
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Pituitary Gland
- center control of endocrine sys.
- secretes large number of hormones
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Hypothalamus Gland
monitors amnt of hormones in blood & corrects imbalances
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Thyroid gland
- produces hormone thyroxinestimulates certain chem, reactions important for tissues
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Hyperthyroidism
- too much thyroxine
- may cause loss of weight/ sleep
- cause overactivity
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Adrenal Glands
- Active when angry/frightened
- release ephinephrine & nonephinephrine [(non)adrenaline]
- also secrete cortical steroids
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Sex Glands
- Testes- produce testosterone
- Ovaries- produce estrogen & progesterone
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Neurotransmitters Vs. Hormones
- Hormones- released into the blood & diffuses throughout the body
- Neurotransmitters- released right beside cell that it is to excite/inhibit
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