Sympathetic Nervous System

Definition

The sympathetic nervous system is part of autonomic nervous system responsible for initiating "fight or flight" response during stressful situations.

Related terms

Parasympathetic Nervous System: This part of the autonomic nervous system helps to conserve energy by slowing the heart rate and increasing intestinal activity.

Adrenal Medulla: It's a part of adrenal gland that secretes adrenaline and noradrenaline when stimulated by sympathetic nervous system.

Homeostasis: A state of equilibrium in the body maintained by various physiological processes, often disrupted during "fight or flight" response.