Severe injury to skeletal muscle can be significant enough to raise CK-MB levels above normal, but such injury doesnât usually cause a high relative index. If your doctor suspects injury to both heart muscle and skeletal muscle, troponin is a more accurate test for identifying a heart attack.
The radial smooth muscle layer (dilator pupillae) is responsible for dilating the pupil. Source(s): http://en.wikipedia.org/wiki/Iris_%28ana...http://en.wikipedia.org/wiki/Dilator_pup...LaughingMan Â· 8 years ago.he iris is composed of two smooth muscle layers, arranged radially and circularly.
Fixed Pupil and Dilated Pupil are known as Mydriasis. It is due to the result of an excitation of the Iris that causes an opening of Pupilâs Aperture. Dilated Pupil is very common in children. There can be different causes of Dilated Pupils but Neurological problems are the main cause of this disease.