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.
Dilation, or widening, of the pupils of the eyes is normal in conditions of low light in order to allow more light to reach the retina. Medically, dilation of the pupils is known as mydriasis.Specific medications known as mydriatics are administered to dilate the pupils for ophthalmologic examination.If the pupils are dilated due to an abnormal response, they may remain dilated even in the presence of sunlight or strong light.Injury to the brain and taking certain drugs are common causes of abnormally dilated pupils. Both medications and drugs of abuse can result in dilated pupils.Dilation of the pupil on one side only is also abnormal and may signal a brain injury or other condition that raises the pressure within the cranial cavity (increased intracranial pressure).f the pupils are dilated due to an abnormal response, they may remain dilated even in the presence of sunlight or strong light. Injury to the brain and taking certain drugs are common causes of abnormally dilated pupils. Both medications and drugs of abuse can result in dilated pupils.