Hormones+Class+Notes+CC


 * 2 kinds of horomones
 * steroid- lipid based
 * peptide- protein based
 * slower than nerves because they go through the blood system
 * ex: estrogen, testosterone, melatonin

How does a hormone work?
 * secreting cell puts hormones into the blood vessel
 * hormone travels through the blood around your whole body
 * hormones go by every cell in your body
 * target cells have special proteins called receptors that attract the hormones
 * hormones = key
 * receptor = lock
 * Where are the hormones produced and secreted?
 * in glands
 * Pineal gland
 * thyroid
 * thymus
 * adrenal gland --> adrenaline
 * Pancreas--> Insulin
 * Ovaries--> Estrogen
 * Testes--> testosterone
 * Where are target cells?
 * heart cells have adrenaline receptors and brain and skin, muscle cells have insulin receptors, estrogen target cells are in the breast.
 * blocking the estrogen receptors can prevent cancer

Study: Drug can curb breast cancer recurrence

 * Letrozole is an estrogen receptor blocker
 * women started taking Letrozole anywhere from 1-7 years after their breast cancer and it still worked
 * Blocks estrogen from allowing a woman's menstrual cycle from occurring.

What is diabetes?
 * pancreas doesn't produce or properly use insulin
 * Type 1 diabetes is when the body doesnt make insulin
 * Type 2 diabetes is where you have trouble with the receptor to accept the insulin