Cells Zip Through Mucus (VIDEO) Johns Hopkins University This video is under embargo. Please login to access this video. Caption A pair of human kidney cells move through fluid. When the fluid changes from the viscosity of water to that of honey, the cells immediately flatten to become quicker and more efficient. Credit Johns Hopkins University Usage Restrictions None License Original content 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.