Which hormone does HGH imitate to promote growth?

The correct answer highlights that human growth hormone (HGH) imitates growth factors to promote growth. Growth factors are naturally occurring proteins that play a crucial role in regulating various cellular processes, including growth, proliferation, and healing. When HGH is released into the bloodstream, it stimulates the liver and other tissues to produce insulin-like growth factor 1 (IGF-1), which is a key growth factor that mediates many of HGH's effects. IGF-1 promotes tissue growth and has anabolic effects on muscle and bone.

In contrast, cortisol is a hormone often associated with stress and can actually inhibit growth in excessive amounts. Insulin primarily regulates glucose metabolism and energy use, rather than directly stimulating growth. Thyroid hormones are important for metabolism and energy regulation, but they don't specifically mimic HGH in promoting growth. Therefore, the connection between HGH and growth factors is fundamental to understanding how HGH influences growth and development in the body.