A is your body's automatic response to internal or external stimuli. These reactions are generally involuntary, driven by the autonomic nervous system to help you adapt, survive, or maintain internal balance (homeostasis). The Core Mechanism: The "Automatic" Body
: This acts as the brake, helping the body return to a resting state once the stimulus is gone. Common Types of Physiological Reactions physiological reaction
: The brain prompts the adrenal glands to release chemicals like adrenaline and cortisol . A is your body's automatic response to internal
: This system acts like an accelerator, speeding up your heart rate and breathing to prepare for action. physiological reaction