the autonomic nervous system is responsible for regulating the activity of glands, smooth muscle, and cardiac muscle. its under involuntary control, meaning it works without us telling it to do so. it's divided into two divisions: sympathetic and parasympathetic. in sympathetic division, here, the preganglionic fiber is short and the preganglionic fiber is long. sympathetic division is very important during emergancy situationd and is commonly associated with "fight or flight" response. it accelerates the heartbeat, dilates the bronchi, and inhibits the digestive tract. the parasympathetic includes cranial nerves and fibers. it is often referred to as the "rest and digest division". here, the preganglionic fiber is long and the preganglionic fiber is short. it promotes responses associated with a relaxed state, such as pupil contraction, digestion of food, and a reduced heart rate.
hope this helps!!
