Hormone+notes+-+RJ

2 kinds of hormones: • steroid • peptides Slower than nerves because they go through the nerves

Types of hormones: • Estrogen • Testosterone • Melatonin

How does a hormone work? • Secreting cell secrets hormones into blood vessel. The hormone travels through blood and gets into all the body’s cells. Target cells have receptors. The hormone is the key and the receptor is the lock. • Where are hormones produced? • Pineal gland • Thymus • Thyroid gland • Adrenal gland Target cells: Where are adrenaline target cells? • The heart cells, brain, skin have adrenaline receptors Where are insulin target cells? • Muscle cells have insulin receptors Where are estrogen target cells? • In the breast

Study: Drug can curb breast cancer recurrence • Letrozole is an estrogen receptors blocker

Diabetes: Type 1 diabetes: • No Insulin (no key) • children Type 2 diabetes: • No receptor (no lock) • adults