What are the divisions of the autonomic nervous system?

The autonomic nervous system (ANS) is responsible for regulating involuntary bodily functions and is divided into two main divisions: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The SNS is responsible for the body's "fight or flight" response, activating during situations of stress or danger. It increases heart rate, dilates blood vessels, and releases stress hormones. On the other hand, the PNS restores the body to a calm state after the activation of the SNS, promoting relaxation and conservation of energy. It slows heart rate, constricts blood vessels, and promotes digestion. Together, these two divisions maintain the balance and regulation of various bodily functions and are crucial for overall physiological well-being.

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