How Does the Nervous System Affect Behavior?

The nervous system has several parts, but the autonomic nervous system is what controls a number of our behaviors through the flight or fight branch or the slow down branch. The fight or flight response, also called the sympathetic branch, is what causes someones heart to pound in fear or to sweat in a moment of stressful situation. The fight or flight response causes the body to produce more adrenaline and moves the blood faster so that the person can escape any danger that may be present.