A molecular brake that keeps muscle architecture in check
Phys.org ·
Every movement we make, from blinking to sprinting, depends on the ability of muscle fibers to contract in a rapid and coordinated way. Achieving this precision requires an intricate internal membrane network known as the transverse tubule, or T-tubule, system. These narrow membrane invaginations carry electrical signals from the cell surface deep into the muscle fiber, where they trigger the release of calcium needed for contraction.
Every movement we make, from blinking to sprinting, depends on the ability of muscle fibers to contract in a rapid and coordinated way. Achieving this precision requires an intricate internal membrane network known as the transverse tubule, or T-tubule, system. These narrow membrane invaginations carry electrical signals from the cell surface deep into the muscle fiber, where they trigger the release of calcium needed for contraction.