In 2015 Illinois will again process all appointment renewals electronically through the National Insurance Producer Registry (NIPR). 1  Appointment renewal date is November 1, 2015. 2  Appointment renewals will be electronically processed through NIPR.
myofibril - one of many contractile filaments that make up a striated muscle fiber. myofibrilla, sarcostyle. sarcoplasm - the cytoplasm of a striated muscle fiber. striated muscle cell, striated muscle fiber - an elongated contractile cell in striated muscle tissue.
1 The myofibril is composed of alternating bands. 2  The I-bands (isotropic in polarized light) appear light in color and the A-bands (anisotropic in polarized light) appear dark in color. 3  The alternating pattern of these bands results in the striated appearance of skeletal muscle.