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1. The postganglionic fibers in the heart play a crucial role in blood pressure regulation.
心脏中的末梢神经纤维在血压调节中起着关键作用。
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2. The sympathetic nervous system controls various physiological functions, including the fight or flight response.
交感神经系统控制着各种生理功能，包括战斗或逃跑反应。
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3. During digestion, the postganglionic fibers of the digestive tract release hormones that regulate food intake and metabolism.
消化过程中，消化道的末梢神经纤维释放激素，调节食物摄入和代谢。