: This system acts like an accelerator, speeding up your heart rate and breathing to prepare for action.

: This acts as the brake, helping the body return to a resting state once the stimulus is gone. Common Types of Physiological Reactions

Physiological reactions act as a bridge between your emotions and your physical actions. When your brain perceives a stimulus—like a sudden loud noise, a stressful email, or a pleasant touch—it sends signals through nerve pathways and hormones to trigger specific bodily changes.

: The brain prompts the adrenal glands to release chemicals like adrenaline and cortisol .