Hormones/the endocrine system

Hormones/the endocrine system

• Hormones are essential for are bodies to work properly.
• Homeostasis:
• Ability to maintain a constant internal environment (temperature, water balance, carbon dioxide, blood sugar)
• It is done with hormones
• What are hormones:
• It is a chemical message that travels in the blood and has specific target organ(s)
• the organs in the system:
• Brain (to start other hormones)
• Thyroid gland (metabolism)
• Adrenal gland (adrenaline)
• Pancreas (insulin (blood sugar))
• Testes (testosterone)
• Ovaries (estrogen)
• If the glands don't work:
• You can medically release the substance
• You can inject those hormones
• Hormonal vs Nervous system:
• Hormonal travels through the blood while nervous are electrical signals along nerves
• Hormonal is slow while nervous is very fast
• Hormonal can act on many target organs at once while nervous can act only on the effector connected to the nerve