What is a muscle fiber structure formed from the sarcolemma that penetrates into the cells?Multiple choice question.SarcolemmaMyofibrilsSacroplasmic reticulumT (transverse) tubules

In a skeletal muscle fiber, the sarcolemma forms tubules that penetrate into the cell and contact the sarcoplasmic reticulum.

The sarcolemma of a muscle fiber is the Blank______.Multiple choice question.plasma membranecytoplasmrough endoplasmic reticulumsmooth endoplasmic reticulum

Deep inward extensions of the sarcolemma form a tunnel-like network inside the muscle cell known as ___________.Group of answer choicestransverse tubulessarcoplasmic reticulummyofilamentsmyofibrils

What structure in a muscle fiber acts as a calcium reservoir or storage site?Multiple choice question.Sarcoplasmic reticulumGolgi apparatusSynaptic vesiclesSarcolemma

Select all of the following that are components of a muscle fiber.Multiple select question.SarcolemmaMyelin sheathT tubuleAxon terminalSarcoplasm