Answer:
Insulin-like Growth Factor-1 (IGF-1)
Explanation:
Insulin-like Growth Factor-1 (IGF-1) is the immediate stimulus for the bodies growth. It is a protein with as much as 70 amino acids.
The anterior lobe of the pituitary gland released a growth hormone that binds with the receptor on the surface of the liver cells that stimulates the synthesis and release of Insulin-like Growth Factor-1 (IGF-1).
