Biology A2 (6BIO5) The sliding filament theory Topic 7 - run for your life. The theory of muscle contraction. 4.0 / 5 based on 14 ratings ? BiologyHuman, animal and plant physiologyA2/A-levelEdexcel Created by: CharlotteCreated on: 15-03-12 21:25 What is a muscle fibre? A single muscle cell 1 of 9 Actin is... the thinner filament of a sarcomere in a myofibril 2 of 9 Myosin is ... the thicker filament of a sarcomere in a myofibril 3 of 9 Calcium ions bind to... troponin on actin 4 of 9 Cross bridges form between... myosin heads and myosin binding sites on actin 5 of 9 ADP and Pi are released when... the myosin head binds to the myosin binding sites on the actin forming cross bridges 6 of 9 A sarcolemma is... the cell surface membrane of a muscle cell 7 of 9 When filaments in a contracted sarcomere are looked at under a microscope... the central intermediate coloured band is no longer visible 8 of 9 Striated means... striped 9 of 9
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