Insulin-like growth factor 1 (IGF-1) is mainly secreted by the liver as a result of stimulation by growth hormone (GH). IGF-1 is important for both the regulation of normal physiology, as well as a...
Water, sunlight and soil nutrients (especially nitrogen, phosphorus and potassium, but others as well) are the main factors affecting the growth of a plant. Other factors are bacterial and fungal...