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.
How much do dirt bikes cost? Depends on what you are looking for. Used or new, small or large, woods or motocrosser. You can pick up a decent used dirt bike for as little as $1500, while new race bikes â¦ can run close to, and some over, $10,000.t would depend on if you are buying it used or new. Other things it would depend is condition, brand, seller, and the parts â¦ they put into it. I would say if you are buying a quality dirt bike new it would cost anywhere between 2,000-14,000 dollars. Used would probably be anywhere from 500-9,000 dollars.