Muscle Fibre Definitions Flashcards
1
Q
Myofibril
A
A cylindrical organelle running the length of the muscle fibre, containing Actin and Myosin filaments.
2
Q
Sarcomere
A
The functional unit of the Myofibril, divided into I, A and H bands.
3
Q
Actin
A
A thin, contractile protein filament, containing ‘active’ or ‘binding’ sites.
4
Q
Myosin
A
A thick, contractile protein filament, with protusions known as Myosin Heads.
5
Q
Tropomyosin
A
An actin-binding protein which regulates muscle contraction.
6
Q
Troponin
A
A complex of three proteins, attached to Tropomyosin.
