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

Which of the following stores calcium within a muscle fiber?Multiple choice question.MyofibrilSarcolemmaSarcoplasmic reticulumTransverse tubule

An elaborate network of membranes in skeletal muscle fibers that functions as calcium storage is Group of answer choicessarcolemmamyofibrilssarcoplasmsarcoplasmic reticulum

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

Which substance is stored in the muscle’s endoplasmic reticulum and then released when a nerve signal stimulates a muscle fiber?Group of answer choicesMyoglobinCalcium ionsATPSarcomeres

What causes the striated appearance of skeletal muscle fibers?Multiple ChoiceLocation of the cisternaeOrganization of components of the sarcomeresArrangement of transverse tubulesPosition of the sarcoplasmic reticulum network