All that was interesting, but the most exciting finding was when I simultaneously introduced both histamine and adrenaline into my tissue cultures. I found that adrenaline signals, released by the central nervous system, override the influence of histamine signals that are produced locally. This is where the politics of the community described earlier come in to play. Suppose you’re working in a bank. The branch manager gives you an order. The CEO walks in and gives you the opposite order. Which order would you follow? If you want to keep your job you’ll snap to the CEO’s order. There is a
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