[Solved] Why did King Louis-Phillippe purchase and then store away Eugène Delacroix's Liberty Leading the People? A) It included a nude in it. B) He believed it would incite the commoners to rebel. C) It was too large to display. D) It satirized his claim to the throne. Substance P: A neuropeptide involved in the transmission of pain and other sensory signals to the brain, also implicated in inflammatory processes and mood regulation. Capsaicin: A chemical compound found in chili peppers that is responsible for their spicy heat, often used in topical creams for pain relief. Endorphin: Natural, pain-relieving chemicals produced by the brain, often associated with feelings of euphoria and well-being, commonly released during exercise, stress, and pain. Histamine: A compound released by the immune system during allergic reactions and inflammation, causing symptoms like itching and swelling.