Final answer:
The autonomic nervous system consists of the sympathetic and parasympathetic divisions and controls involuntary functions in the body. The sympathetic division prepares the body for threats, while the parasympathetic division promotes rest and digestion. The ANS helps maintain homeostasis by regulating organ systems.
Step-by-step explanation:
The autonomic nervous system (ANS) consists of two divisions: the sympathetic division and the parasympathetic division. The sympathetic division is responsible for the fight-or-flight response, which prepares the body to confront threats.
The parasympathetic division, on the other hand, promotes rest and digestion when the external environment is not threatening. The ANS controls involuntary functions of the body, such as heart rate, breathing, and glandular secretions. It helps maintain homeostasis by regulating the organ systems in the body.