Like Y-DNA STRs, autosomal STRs are counts of repeated genetic code. As autosomal DNA recombines each generation, the number of markers shared with a specific ancestor is reduced by half each generation.
Heroin acts as a lipid soluble âprodrugâ within the brain, meaning that heroin itself is inactive but it is metabolized into an active form within the body. After crossing the blood-brain barrier, heroin is metabolized into morphine, which actively binds to opiate receptors in the brain producing the high.
HEROIN: WHAT IS IT? Heroin is a highly addictive, illegal drug. It is used by millions of addicts around the world who are unable to overcome the urge to continue taking this drug every day of their livesâknowing that if they stop, they will face the horror of withdrawal. Heroin (like opium and morphine) is made from the resin of poppy plants.