Cardiac muscle tissue, or myocardium ... Cardiac muscle cells appear striated or striped under a microscope. These stripes occur due to alternating filaments that comprise myosin and actin ...

This influx of calcium at the contact site attracts and activates a kinase called CaMKII, a protein known to be important in ...

Using high-resolution microscopy, A. F. Huxley and R. Niedergerke (1954) and H. E. Huxley and J. Hanson (1954) observed changes in the sarcomeres as muscle tissue shortened. They observed that one ...

For example, the cells and fibers of muscle tissue are highly aligned so that ... and then confirmed it under the microscope: ...