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 (-5[1])of calcium ions (-5[1])to calmodulin (cal-MOD-joo-lin). Cells of (10[1])this tissue contain dense bodies to anchor thin filaments, (-5[1])which along with thick (-5[1])filaments are woven in diagonal chains. Tumors of this tissue are called leiomyomas (lay-oh-MY-oh-maz) or fibroids. This tissue is responsible for (10[1])peristalsis (10[1])in the digestive tract, and its "vascular" type regulates the (-5[1])width of blood vessels. This tissue, which lacks sarcomeres (SAR-koh-meers) and is thus non-striated, lines the walls of organs such (-5[1])as the bladder and stomach. (10[1])For 10 points, what type of involuntary (10[1])muscle is contrasted (10[1])with (10[2])cardiac and skeletal muscle? ■END■