Regulation of iron absorption and transport. Iron for use in synthesis of heme, iron-sulfur centers and other non-heme iron proteins is obtained from the diet and via release of recycled iron from macrophages of the reticuloendothelial system that ingest old and damaged erythrocytes (red blood cells).
Four-stroke oil is more like the oil used in cars but both 2-stroke and 4-stroke oil serve the same purpose - to keep the engine lubricated. Four-stroke dirt bike oil comes in a variety of weights like 10w-40, 20w-50 and so on. It is not mixed with gas.
This hybrid, billed as the worldâs first aero gravel bike, was probably the most sought-after ride on the dirt road day. The biggest difference between the Exploro and its cousin, the Open U.P., is this bikeâs chunky, aerodynamic tubing, which might seem strange for dirt road riding.