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.
Above: Diagram of the structure of a muscle fibre, indicating a single myofibril (top right). Above: Diagram of the structure of a muscle fibre, indicating a single myofibril (top right). Each myofibril consists of two types of protein filaments. They are thin filaments and thick filaments.his Section is about The Anatomical Structures of Muscles. To read about other related terms use the links on the. left-hand side of this page. Click here for more textbooks. Myofibril is the name given to cylindrical structures that extend along the complete length of each muscle cell.