PSL300H1 Lecture Notes - Lecture 31: Autonomic Nervous System, Postganglionic Nerve Fibers, Parasympathetic Nervous System
Document Summary
The autonomic nervous system is automatic or involuntary. Ans is part of the cns that controls (the bodily homeostatic parts) Internal organs: blood flow, smooth muscles of the eye (internal environment, viscera (organ systems in lungs + abdomen, these actions are very quick to minimize homeostatic errors. The ans is a separate sort of system but ans cannot be separated in isolation from the cns, because autonomic activities are always coordinated with the activity of the cns. The ans also works with the endocrine system and behavioural state systems to maintain homeostasis (all done involuntarily) The ans deals with more than just fight or flight" emergencies exercise, emotion, effect of gravity, eating. Important in exercise because the need to divert the blood from muscle to stimulate the glands. Changes in the body position requires the regulation of blood pressure. Eating rerouting materials from the intestine. Ans can be divided into its preganglionic and postganglionic components.
