A T-tubule is a deep invagination of the sarcolemma, which is the plasma membrane, only found in skeletal and cardiac muscle cells. These invaginations allow depolarization of the membrane to quickly penetrate to the interior of the cell.
The numerical value of t-tubule in Chaldean Numerology is: 3
The numerical value of t-tubule in Pythagorean Numerology is: 2
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