How Cells Respond when Invaded by Bacteria (video) University of North Carolina Health Care Share Print E-Mail Loading video... Caption Researchers at the University of North Carolina School of Medicine have identified a sensor pathway inside cells. These internal sensors are like motion detectors inside a house; they trigger an alarm that signals for help -- a response from the immune system. This video demonstrates how cells respond when invaded by bacteria. Credit Miao Lab/UNC School of Medicine Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.