Relating to the stomach and intestines.

The gastrointestinal system consists of the gastrointestinal tract, a tube extending from the mouth to the anus; its purpose is to break down food, prepare it for absorption and eliminate waste.

Nonproprietary, or not protected by trademark registration.

A drug not protected by a trademark. Also, the scientific name as opposed to the proprietary, brand name.

The beginning of a process.

The beginning or origin; into being of something; the process or mode of origin.

A variety of techniques that molecular biologists use to manipulate DNA molecules to study the expression of a gene.

A laboratory technique sometimes used to identify a defective gene in an unborn child which may cause a particular disease.

Glomerular filtration rate.

GFR is a calculation of how efficiently the kidneys are filtering wastes from the blood. A traditional GFR calculation requires an injection into the bloodstream of a substance that is later measured in a 24-hour urine collection. Recently, scientists found they could calculate GFR without an injection or urine collection. The new calculation requires only a measurement of the creatinine in a blood sample.
Creatinine is a waste product in the blood created by the normal breakdown of muscle cells during activity. Healthy kidneys take creatinine out of the blood and put it into the urine to leave the body. When kidneys are not working well, creatinine builds up in the blood.

Growth Hormone, secreted by the pituitary gland; the major hormone responsible for height growth

Also plays a role in maintenance of bone density in adults, body composition in that it builds muscle and breaks down fat, regulates lipids, and may play a role in cardiovascualr health.

Growth hormone releasing hormone.

GHRH, or growth hormone releasing hormone is a hypothalamic peptide that regulates the synthesis and secretion of growth hormone in the anterior pituitary gland.
The growth hormone (GH) stimulation test measures the level of growth hormone (GH) in the blood after you receive arginine or GH-releasing hormone. The test measures the ability of the pituitary gland to release GH.

Growth hormone release inhibiting hormone (same as SRIF)

Somatostatin inhibits growth hormone release in response to GHRH

Growth hormone releasing peptide.

Growth hormone releasing peptide (GHRP-6) is a synthetic hexapeptide which specifically stimulates secretion of growth hormone.

An organ of the body that produces materials (hormones) released into the bloodstream, such as the pituitary or pineal gland. Hormones influence metabolism and other body functions.

Endocrine glands include the Adrenals, Hypothalamus, Islets of Langerhans in the pancreas, Ovaries, Parathyroids, Pineal, Pituitary, Testes, and Thyroid