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.
Structure of Skeletal muscles The myofibril consists of protein chains called myofilaments Myofilaments have a symmetrical, alternating pattern of thick and thin elements. Skeletal Muscle Myosin Thick myofilament consists of a large number of bundled myosin molecules aligned in overlapping arrays.