FILGRASTIM, G-CSF (fil GRA stim) is a granulocyte colony-stimulating factor that stimulates the growth of neutrophils, a type of white blood cell (WBC) important in the body's fight against infection.
The hypothalamus, a part of the brain, is responsible for many hormones. Understanding these brainy hormones will help you take control of your body and your health. The hypothalamus produces hormones that control the production of hormones in the pituitary gland.
The posterior pituitary is actually part of the brain and receives input from the hypothalamus via neural connections. The anterior pituitary gland is controlled by the hypothalamus when the latter releases tropic hormones (hormones that control release of other hormones) into the blood portal. The hormones diffuse through the blood and act on the anterior pituitary gland, initiated the release of subsequent hormones.