Transverse tubules. Tubules formed by invaginations of the sarcolemma and flanked by the sarcoplasmic reticulum. They carry action potentials deep into the muscle fiber. T tubules and SR provide tightly linked signals for muscle contraction.
Also known as Oxycodone, PercocetÂ® is in a group of drugs called narcotic pain relievers. Percocet Â® is a combination of an analgesic, colloquially known as a painkiller, an antipyretic, a drug used to lower the bodyâs temperature and a narcotic, a drug used primarily to induce sleep.
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.