<Tr> <Th_colspan="2"> T - tubule </Th> </Tr> <Tr> <Td_colspan="2"> Skeletal muscle, with T - tubule labelled in zoomed in image . </Td> </Tr> <Tr> <Td_colspan="2"> T - tubule structure and relationship to the sarcoplasmic reticulum in skeletal muscle </Td> </Tr> <Tr> <Th_colspan="2"> Details </Th> </Tr>

What structure transports the depolarization from sarcolemma to the inside of a cell