In adults, many different types of tissue stem cells take part in maintaining ... muscle stem cells are normally quiescent and activate only if they receive a signal of muscle injury. The stem cell ...

muscle tissue. In muscle cells, the ER and the plasma membrane—the outer membrane of the cell—meet at periodic contact sites, an arrangement controlled by a molecule called junctophilin.

Within multicellular organisms, tissues are organized communities of cells that work together to carry out a specific function. The exact role of a tissue in an organism depends on what types of ...

In skeletal muscle, the cells merge so that the muscle fibres contract in unison. There are many different types of cells in plants. Each type is specialised to do a particular role and ensures ...

The body's internal clock influences muscle healing, with faster recovery occurring during natural waking hours.