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What is the relationship that occurs in the trade of a skeletal muscle cell?

What is the relationship that occurs in the trade of a skeletal muscle cell?
Science   Anatomy-And-Physiology   
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Answer #1

Skeletal muscle has a triad of -Transverse tubule and two terminal cisternae. They lie close to each other.

When action potential reaches sarcolemma, it is further transmitted to transverse tubule and to the sarcoplasmic reticulumn which is the storehouse of the calcium.

One transverse tubule is connected to two sarcoplasmic reticulumn, thus increasing the efficiency of muscle contraction by releasing more and more calcium.

As more calcium is released , it will be used in binding of calcium to troponin and will remove troponin-tropomyosin complex from myosin to allow binding of actin to myosin, this way cross bridge formation will occur.

Thus relationship of this triad in skeletal muscle is essential for rapid transmission of impulses from sarcolemma to the sarcoplasmic reticulumn and rapid initiation of muscle contraction.

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