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.
Darvocet Â® (propoxyphene/acetaminophen) is a prescription pain medication. It is a narcotic medication and is classified as a controlled substance. In November 2010, the United States Food and Drug Administration (FDA) withdrew all medications that contain propoxyphene from the market.