blood-brain barrier, n barrier formed by epithelial cells in the capillaries that supply the brain and central nervous system. This barrier selectively allows entry of substances such as glucose, some ions, and oxygen, while blocking entry of other substances.lood-brain barrier (BBB). Etymology: AS, blod + bragen + ME, barrere. an anatomic-physiologic feature of the brain thought to consist of walls of capillaries in the central nervous system and surrounding astrocytic glial membranes. The barrier separates the parenchyma of the central nervous system from blood.
Vegetable Oil vs. Canola Oil. Canola and vegetable oils are both plant-based oils that are liquid at room temperature. They're both beneficial for heart health, and are commonly used in cooking and baking. Therefore, it may be difficult to determine which type of oil is the better option for you -- but subtle differences do exist. What Oils Are Made From. The main difference between vegetable and canola oils is the type of plant they are made from. Canola oil is extracted from rapeseed plants, which are related to mustard and cabbage plants. Vegetable oil on the other hand, is no other than soybean oil in many cases.
Unlike standard rapeseed oil, which has relatively high levels of cardiotoxic fatty acids such as erucic acid, and is used in the West only for industrial purposes, canola is derived from special breeds of the rape plant selected for low levels of erucic acid.