This is a schematic of the neurons that form the antagonistic pair in the arcuate nucleus, a region that has a fenestrated blood-brain barrier that allows signaling by hormones from the periphery. I have put in labels for 4 key hormones and 3 key receptors that are involved in this neuronal pathway that are responsible for stimulating appetite and, in part, regulating satiety. Your task is to look up the following hormones: Leptin Agouti-related protein (AgRP) Insulin Ghrelin Then answer the questions below. 1: In the figure what is the identity of receptor 1 (R1)? ____ 2: In the figure what is the identity of receptor 3 (R3)? ____ 3: In the figure what is the identity of receptor 2 (R2)? ____Matching