Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Neural Regulation The nervous system plays a critical role in the regulation of vascular homeostasis. The primary regulatory sites include the cardiovascular centers in the brain that control both cardiac and vascular functions. In addition, more generalized neural responses from the limbic system and the autonomic nervous system are factors. Answer: nervous system
What system plays a critical role in the regulation of vascular homeostasis?