Final answer:
During adolescence, the major growth hormones include testosterone, estrogen, and human growth hormone (HGH), with HGH also stimulating the release of IGF-1 for bone development.
Step-by-step explanation:
The growth hormones that are significant during the stage of development referred to by the question are testosterone and estrogen, along with human growth hormone (HGH). Testosterone and estrogen are critical for the adolescent growth spurt and other developmental changes that occur during puberty.
Human growth hormone stimulates cellular growth and regeneration throughout life and also stimulates the release of insulin-like growth factor 1 (IGF-1), which plays a role in bone development. The pancreas secretes other important hormones, specifically glucagon and insulin, which regulate blood sugar levels but are not primarily growth hormones.