Historical Examples. 1  It will be seen that the valves v on the other side of the annular chamber are closed. 2  The angle of the anterior chamber is a true angle and not an annular sinus. 3  Johnston suggests that the reference is to an annular eclipse which he finds occurred on August 14, at about 8Â¼ h. in the morning.
Cellular nutrients come in many forms, including sugars and fats. In order to provide a cell with energy, these molecules have to pass across the cell membrane, which functions as a barrier â but not an impassable one.
Sugars and fats are among some of the most important nutrients that can be broken down by the cells and utilized for energy purposes. Certain types of proteins that exist on the surface of the membrane of the cell allow these types of materials to enter the cell. Cells then break these food particles down through a series of oxidation processes. This allows for the transfer of electrons into the cell. The electrons from the food are taken in by the cell. Once this has been done, the cell can convert the energy into small molecules with lots of energy, such as nicotinamide adenine dinucleotide.