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.
And no. Oxycodone is a generic chemical opioid and is the active ingredient in OxyContin. And OxyContin is a brand name drug that contains oxycodone. The addictiveness of OxyContin and oxycodone are generally the same.