Figure 2. Control of reproductive behavior based on chemical cues. The olfactory lobe acts as a switch between growth and reproduction. In addition, the olfactory lobe modulates the olfactory organ to be more sensitive to food or sex odors via the molecular players identified: (in red) FMRFamide, NPY, and Galanin inhibit reproduction and stimulate food intake; (in green) GnRH, APGWamide, ER (estrogen receptor), and NMDA stimulate reproduction inhibiting sensitiveness to food odors.