Endocrine System

Endocrine System

Provides communication and control of the body

Hormone

Chemical that transfers messages throughout the body

Second Messenger System

Stimulates a cell to produce another substance that triggers the receptor

Target Cell

Cells that have a receptor for a particular hormone

Second Messenger

Molecules that are created in response to a hormone and can trigger a target cell

Nonsteroid Hormone

Cannot pass through the cell membrane

Steroid Hormone

Lipid-soluble; can pass through a cell membrane

Negative Feedback

Fights to lower the levels of something

Positive Feedback

Amplify changes in the body

Prostaglandins

Tissue hormones that affect a diffuse a short distance to affect local cells

Pituitary Gland

Pea-sized gland located in the brain; has two parts

Adenohypophysis

Anterior pituitary

Neurohypophysis

Posterior Pituitary

Tropic Hormones

Hormones that stimulate the production of other hormones

Diabetes Insipidus

Occurs when too little ADH is produced, causes large volumes of urine to be released

Hypothalamus

Produces hormones that it releases and passes to the pituitary gland