Title: What is the T tubules function in muscle contraction?
Headings: What is the T tubules function in muscle contraction?
Asked by: Ibrahym Antinori
What is the T tubules function in muscle contraction?

Content: Similarly, do T tubules have voltage gated channels? Action potentials are conducted into the interior of muscle fibers via the T-tubules and there activate voltage-gated channels known as dihydropyridine receptors (DHPR). Unlike in cardiac muscle, very little calcium enters the muscle fiber from the extracellular space (via the DHPR). Regarding this, how would you explain skeletal muscle cell contraction were there no T tubules? 2012). Muscle contraction relies on the movement of electrical charge through the T tubules to trigger the release of calcium ions. Without the T tubules muscle contraction would not be possible. Are T tubules present in smooth muscle? Although smooth muscle contraction relies on the presence of Ca++ ions, smooth muscle fibers have a much smaller diameter than skeletal muscle cells. T-tubules are not required to reach the interior of the cell and therefore not necessary to transmit an action potential deep into the fiber.