{"knowledge_schema": {"broad_category": "Biology \u2192 Neurobiology \u2192 Neuroendocrinology", "refinement": "This problem focuses on the mechanisms of neural stem cell reactivation in Drosophila and the role of Dilp2 in this process.", "specific_scope": "The task involves understanding the sources and pathways of Dilp2 that influence neural stem cell behavior in response to feeding.", "goal": "Identify the source of Dilp2 that drives neural stem cell reactivation based on the provided information."}, "summary": "The question asks about the source of Dilp2 that drives neural stem cell reactivation in Drosophila. The options include whether Dilp2 is transported to the DRNs through retrograde transport, secreted to the hemolymph, both, or neither. Given that Dilp2 is expressed in IPCs and can be secreted into the hemolymph, it is likely that both pathways contribute to its role in neural stem cell reactivation. Therefore, the most accurate answer is that both sources (A and B) are involved in driving the reactivation of neural stem cells."}