Question

In a muscle fibre

• A. Sacrolemma is connective tissue holding the myofibrils together
• B. T system contains calcium storage sacs
• C. Both filaments have cross-bridges
• D. All of the above

Answer 1

The correct option is B T system contains calcium storage sacs

Terminal cisternae are enlarged areas of the sarcoplasmic reticulum surrounding the transverse tubule because terminal cisternae ensure rapid calcium delivery, they are well developed in muscles that contract quickly such as fast-twitch skeletal muscle.

So, the T system contains calcium storage sacs.