Physiology The thick filament is made up of Heavy chain of myosin Light chain of myosin Dystrophin Titin A 1, 3, and 4 B 2, 3 and 4 C 1 and 2 D 3 and 4 💡 Explanation The thick filament is made up of Heavy chain of myosin Light chain of myosin Dystrophin Titin ✓ Correct Answer: C. 1 and 2