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Growth Hormone-Releasing Hormone (GHRH)
Growth Hormone-Releasing Hormone (GHRH) The hormone released from the hypothalamus. GHRH causes the release of growth hormone from the pituitary. GHRH uses cyclic AMP as its second messenger.
RELATED TERMS--------------------------------------
Hormone
A chemical substance formed in the body that is carried in the bloodstream to affect another part of the body; an example is thyroid hormone, produced by the thyroid gland in the neck, which affects growth, temperature regulation, metabolic rate, and other body functions.
Hypothalamus
The portion of the brain's limbic system that integrates incoming information, and either increases or decreases the release of certain hormones that instruct the pituitary gland to release hormones.
Pituitary
The gland from which a number of hormones are released into the bloodstream. These hormones include growth hormone, ACTH, B-lipocortin (the precursor to B-endorphorin), FSH, LH, and TSH.
SIMILAR TERMS--------------------------------------
Growth factor
A naturally occurring protein chemical that stimulates cell division and proliferation. It is produced by normal cells during embryonic development, tissue growth, and wound healing. Tumors, however, produce large amounts of growth factors.
Growth Hormone
The hormone released from the pituitary gland. It interacts with fat cells to release fatty acids, and with the liver to produce insulin-like growth factors.
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Glucose Tolerance
The ability of muscle cells and the liver to remove glucose from the bloodstream. As you age, glucose tolerance decreases.
Glycemic Index
A measure of the rate at which a carbohydrate will enter the bloodstream as glucose. Some simple sugars, such as table sugar, will enter the bloodstream slower than many complex carbohydrates, such as bread, rice, and potatoes. The faster a carbohydrate enters the bloodstream, the higher its glycemic index. The higher the glycemic index of a carbohydrate, the greater the increase in insulin levels. Fruits and vegetables tend to have a low glycemic index, whereas breads, pasta, grains, and starches tend to have a high glycemic index.
Glycogen
The storage form of glucose. Only glycogen from the liver can be used to restore blood glucose levels.
Glycosylated Hemoglobin
A measure of the long-term control of blood glucose determined by the amount of carbohydrate-modified hemoglobin in the red blood cells. The higher the amount of glycosylated hemoglobin, the worse the control of blood glucose levels.
Growth Hormone
The hormone released from the pituitary gland. It interacts with fat cells to release fatty acids, and with the liver to produce insulin-like growth factors.
Growth Hormone-Releasing Hormone (GHRH)
Ganglia
Clusters of cell bodies of neurons outside of the central nervous system.
Genetic information
A DNA sequence (sometimes genetic sequence) is a succession of letters representing the primary structure of a real or hypothetical DNA molecule or strand, The possible letters are A, C, G, and T, representing the four nucleotide subunits of a DNA strand (adenine, cytosine, guanine, thymine), and typically these are printed abutting one another without gaps, as in the sequence AAAGTCTGAC. This coded sequence is sometimes referred to as genetic information.
Grand mal
A seizure characterized by loss of consciousness with general tonic/clonic (musculature contractions and relaxation in rapid succession also with tension) movements.
Goodpasture Syndrome
A combination of pulmonary hemorrhage and glomerulonephritis. It is known also as the lung purpura glomerulonephritis complex.
Graft Versus Host Disease
A common complication of allogeneic blood and marrow transplantation where there is a reaction of the donated hematopoietic progenitor cells against the recipient's own tissue.
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