This specific tissue comes in single-unit and multi-unit types, of which the latter is neurogenic. Phosphodiesterase 5 (phospho-di-ester-ayss "five") inhibitors affect the function of this tissue by increasing cells' levels of cGMP. Cross-bridge cycling in this tissue is controlled by the binding of (-5[1])calcium ions to (-5[1])calmodulin (cal-MOD-joo-lin). Cells of this (10[1])tissue contain dense bodies to anchor thin filaments, which (-5[1])along with thick filaments (-5[1])are woven in diagonal chains. Tumors of this tissue are called leiomyomas (lay-oh-MY-oh-maz) or fibroids. This tissue is responsible for peristalsis (10[1])in (10[1])the digestive tract, and its ■END■