Jackson County Donates to Special Olympics Jackson County associates made a donation of $400 to Special Olympics. Parks + Rec also donated 600 boxes of candy to the cause.
Transverse tubules are extensions of the cell membrane that penetrate into the centre of skeletal and cardiac muscle cells. With membranes that contain large concentrations of ion channels, transporters, and pumps, T-tubules permit rapid transmission of the action potential into the cell, and also play an important role in regulating cellular calcium concentration. Through these mechanisms, T-tubules allow heart muscle cells to contract more forcefully by synchronising calcium release throughout
Microtubules are long, hollow cylinders made up of polymerised Î±- and Î²- tubulin dimers. The Î± and Î²-tubulin subunits are approximately 50% identical at the amino acid level, and each have a molecular weight of approximately 50 kDa.here are many proteins that bind to microtubules, including the motor proteins kinesin and dynein, severing proteins like katanin, and other proteins important for regulating microtubule dynamics.