6. T.S. Of Skeletal Muscle
The dark purple nuclei can be seen on the edges of the muscle fibres. Sarcolemma - cellular membrane Terminal cisterna - extension of sarcolemma that stores calcium T-tubules - invaginations of sarcolemma that transfer action potentials to the inside of the muscle cell Sarcoplasm - cytoplasm Sarcomplasmic reticulum - modified endoplasmic reticulum Actin, myosin - contractile elements Sarcomere - functional unit (made of actin and myosin) Accessory proteins - titin, tropomodulin, alpha-actinin, desmin, nebulin, dystrophin, myomesin