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.
(CNN)Percocet is a painkiller that's part of a family of drugs known as opioids. Though some are derived naturally, such as heroin or morphine, others are synthesized in the lab, including hydrocodone and oxycodone. Percocet is the brand name of a drug that mixes oxycodone and acetaminophen.