The t tubule contributes to muscle movement because it .

The t tubule contributes to muscle movement because it helps in triggering or initiation of the action potential inside the muscle cells.                

Explanation:

As, there are number of structures of which activities are required to attain specific posters for the animal body and they play a vital role in making any physical activity either very fast or too slow in nature.And along with this the chemical balance always fluctuates due to the requirement of locomotion or change in posters for the animal's body, as the T tubule has other cellular structures such as the sacromere and fibers which plays a great part in the as whole physical activities of the animal body.

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