Iris dilator muscle Iris dilator muscle The iris dilator muscle (pupil dilator muscle, pupillary dilator, radial muscle of iris, radiating fibers), is a smooth muscle of the eye, running radially in the iris and therefore fit as a dilator. The pupillary dilator consists of a spokelike arrangement of modified contractile cells called myoepithelial cells. These cells are stimulated by the sympathetic nervous system. When stimulated, the cells contract, widening the pupil and allowing for more light to pass through the eye. It is innervated by the sympathetic system, which acts by releasing noradrenaline, which acts on α1-receptors. Thus, when presented with a threatening
Ghetto Supastar (That Is What You Are) Ghetto Supastar (That Is What You Are) "Ghetto Superstar (That Is What You Are)" is a song by American rapper Pras, featuring rapper Ol' Dirty Bastard and R&B singer Mýa. It was released on June 6, 1998. The track samples Kenny Rogers and Dolly Parton's 1983 single "Islands in the Stream" and was produced by Wyclef Jean and Jerry 'Wonda" Duplessis for Pras' debut solo studio album, "Ghetto Superstar". It was also featured on the soundtrack for the 1998 film "Bulworth". The song's writers are Prakazrel Michel, Wyclef Jean, Russell Jones, Barry Gibb, Robin Gibb, and Maurice Gibb. The song