Final answer:
The autonomic nervous system is the division of the peripheral nervous system that regulates glands and activities like heartbeat, respiration, digestion, and dilation of the pupils.
Step-by-step explanation:
The division of the peripheral nervous system that regulates glands and activities like heartbeat, respiration, digestion, and dilation of the pupils is the autonomic nervous system. Within the autonomic nervous system, there are two divisions: the sympathetic division and the parasympathetic division.
The sympathetic division is responsible for the fight-or-flight response, while the parasympathetic division controls routine functions of the body.