parasympathetic efferent fiber

例句：

1. 1.The parasympathetic efferent fibers play a crucial role in the regulation of heart rate and blood pressure.
   副交感神经传入纤维在调节心率和血压方面起着至关重要的作用。
2. 2. In the brain, these fibers connect to various regions to help regulate emotions and behavior.
   在大脑中，这些纤维连接到各种区域，帮助调节情绪和行为。
3. 3. Due to their role in regulating autonomic functions, these fibers are often targeted for treatment of certain diseases.
   由于这些纤维在调节自主功能方面的作用，它们常被用于治疗某些疾病。