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.
There are several types of pupillary reflexesâ the pupillary light reflex, the consensual reflex, accomodation for near vision and the ciliospinal reflex.hese are the pupillary reflexes mediated through the parasympathetic division of the autonomic nervous system; 2. the ciliospinal reflex which tests pupillary responses mediated through the sympathetic division of the autonomic nervous system, and 3. the salivary reflex which is also parasympathetic.