T-tubules: Difference between revisions
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T-tubules (also transverse tubules) are invaginations of the [[Muscle|muscle]] membrane ([[Sarcolemma|sarcolemma]]) which penetrate deep into the muscle fibre. [[Action potential|Action | T-tubules (also transverse tubules) are invaginations of the [[Muscle|muscle]] membrane ([[Sarcolemma|sarcolemma]]) which penetrate deep into the [[muscle fibre|muscle fibre]]. [[Action potential|Action potentials]] inside t-tubules triggers [[Calcium|Ca]]<sup>[[Calcium|2+]] </sup>release from terminal cisternae of the [[Sarcoplasmic reticulum|sarcoplasmic reiticulum]], which in turn will produce a contraction. <br> | ||
Revision as of 07:43, 22 October 2012
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.