<prompt> Which of the following is not permeable through the Blood Brain BarrierWaterLipophilic drugsGasProteins  <response>: Ans. d ProteinsRef: Ganong, 25th edp. 607Substances that crosses the Blood Brain Barrier easily are,Water using carrier protein Aquaporin -4Glucose using glucose transporters GLUT 1 55K and GLUT 1 45KO2 CO2 Steroid hormonesSubstances that do not crosses the Blood Brain Barrier easily are,Protein hormonesDopamineH ionsBicarbonate ions 