T-tubules

From The School of Biomedical Sciences Wiki
Revision as of 19:12, 15 November 2018 by 180344242 (talk | contribs) (Added a link)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

T-tubules (also transverse tubules) are invaginations of the muscle membrane (sarcolemma) which penetrate deep into the muscle fibre. Action potentials inside t-tubules triggers Ca2+ release from terminal cisternae of the sarcoplasmic reiticulum, which in turn will produce a contraction. The arrangement of T-tubules and their sizes are vary depending on the muscle type.