Misrecognition (video) Brown University Loading video... Caption Receptors on the cell's surface crowd around the nanotube, effectively standing it upright. The cell mistakes the tube for a sphere and begins to engulf it. Credit Huajian Gao Lab, Brown University Usage Restrictions None 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.