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.
Percocet is the trade name for a prescription pain reliever that combines: 1  Oxycodone, an opioid analgesic - or narcotic painkiller - with similar effects as heroin and morphine.  Acetaminophen, the active ingredient in Tylenol--a mild pain reliever and fever reducer.