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.
The part of the myofibril between two successive Z-lines is called sarcomere. Therefore, the sarcomere comprises A-band and half of each adjacent I-band. A sarcomere is about 2 to 3 mm long. The sarcomere is the functional unit of contractile system in muscle.