Autonomic Nervous System - GCSE Psychology Definition

The Autonomic Nervous System (ANS) is a vital part of the human nervous system that controls involuntary bodily functions, such as heart rate, digestion, and respiratory rate. It operates automatically, without conscious effort, to maintain homeostasis in the body. The ANS is divided into two main branches: the sympathetic nervous system, which prepares the body for 'fight or flight' responses during stressful situations, and the parasympathetic nervous system, which promotes 'rest and digest' activities when the body is relaxed. Understanding the functions of the ANS is crucial in psychology, as it helps explain how our bodies respond to stress and maintain balance in different situations.