The autonomic nervous system ans formerly the vegetative nervous system is a division of the peripheral nervous system that supplies smooth muscle and glands and thus influences the function of internal organs the autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions such as the heart rate digestion respiratory rate pupillary . The enteric nervous system is also sometimes considered part of the autonomic nervous system and sometimes considered an independent system the ans is unique in that it requires a sequential two neuron efferent pathway the preganglionic neuron must first creat a synapse to a postganglionic neuron before innervating the target organ. The autonomic nervous system ans is the part of the nervous system that regulates involuntary functions 1 examples are the heartbeat the digestive functions of the intestines control of respiration and secretion by glands basic anatomy and physiology the organization of the ans is on the basis of the reflex arc and it has an afferent limb efferent limb and a central integrating system 1. The autonomic nervous system ans is the part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness and controlling visceral functions the ans affects heart rate digestion respiratory rate salivation perspiration pupillary dilation micturition urination and sexual arousal. The sympathetic nervous system prepares the body for situations requiring alertness or strength or situations that arouse fear anger excitement or embarrassment fight or flight situations in these kinds of situations the sympathetic nervous system stimulates cardiac muscles to increase the heart rate causes dilation of the bronchioles of the lungs increasing oxygen intake
How it works:
1. Register Trial Account.
2. Download The Books as you like ( Personal use )