Chp. 50

Substances secreted by cells that act to regulate the activity of other cells in the body

Ductless organs that secrete hormones either into the bloodstream of the fluid around cells

The endocrine glands and specialized cells that secrete hormones

Secrete Substances through ducts (tube-like structures)

Hormones made of amino acids

Lipid hormones that the body maked from cholesterol

Specific cells which a hormone travels to produce a specific effect

Proteins that bind specific signal molecules that cause the cell to respond

A molecule that initiates changes inside a cell in response to the binding of a specific substance to a receptor on the outside of a cell

Hormones secreted by the nervous system

Modified fatty acids that are secreted by most cells

The area of the brain that coordinates many activities of the nervous and endocrine systems

Suspended from the hypothalamus by a short stalk

Located near the lower part of the larynx

Located above each kidney

Two amino-based hormones

Promotes the production of glucosefrom proteins making usable energy available to cells

The ovaries in females and the testes in males

The adolescent stage during which the sex organs mature and secondary sex characteristics

Stimulate secretion of sex hormones from the gonads

In females they cause the monthly release of an egg by an ovary and buildup of the uterine lining

An androgen that regulates male secondary sex characteristics

Lowers the bloos sugar level by stimulating body cells, especially muscles, to store glucose or use it for energy

A condition in which cells are unable to obtain glucose, resulting in abnormally high blood glucose concentrations

Concentrations increase sharply at night and decrease dramatically during the day

The final step in a series of events inhibits the initial signal in the series

Release of an initial hormone stimulates releaseor production of other hormones or substances, which stimulate further release of the initial hormone