It is basically used to allow the growth and division of either epidermal cells or the epithelial cells of our body. And notice that in this particular case, just like in the Insulin case, this receptor actually contained a tyrosine protein kinase domain. And this particular pathway, just like the epinephrine pathway also used a specific type of molecule that is stimulated as a result of the binding of GTP. And these are known as G proteins. And in this case this is known as a small G protein. Now the final question is once this pathway takes place and accomplishes what it actually wanted to accomplish so those cells divide and grow, how exactly does our body basically shut off this pathway?