The sarcoplasmic reticulum (SR) of skeletal muscle cells is a convoluted structure composed of a variety of tubules and cisternae, which share a continuous lumen delimited by a single continuous membrane, branching to form a network that surrounds each myofibril.
Percocet is the brand name for the drug combination of oxycodone hydrochloride and acetaminophen. It is classified as a semisynthetic pure opioid agonist medication used for relief of moderate to moderately severe pain.
As for the round white pill indexed 512 on one side and scored on the other, it is a generic version for Percocet manufactured by Mallinckrodt Pharmaceuticals. someone said it was only used for dentle pain. That is untrue. it is used for moderate to severe pain of any kind and can be very addictive.