Why Are the Terminal Cisternae Important?

Because terminal cisternae ensure rapid calcium delivery, they are well developed in muscles that contract quickly, such as fast twitch skeletal muscle. Terminal cisternae then go on to release calcium, which binds to troponin.

Are there terminal cisternae in cardiac muscle?

Inside the muscle fibre, the T-tubules lie next to the terminal cisternae of an internal membrane system derived from the endoplasmic reticulum, called the sarcoplasmic reticulum (SR), which is a store of calcium ions. ... Cardiac Muscle also has T-tubules, and SR.

What is terminal cisternae quizlet?

terminal cisternae. enlarged areas of the sarcoplasmic reticulum surrounding the transverse tubules, which store calcium for release at the start of muscle contraction.