Skeletal Muscle Flashcards
0
Q
what reaction causes the myosin head to attach to actin (thin filaments) and what causes release of the head?
A
ATP –> ADP + Pi
Release of ADP + Pi from myosin head.
1
Q
what are striations caused by?
A
organised array of intracellular myofibrils.
2
Q
what protein does calcium bind to which allows contraction to occur? Where is this protein located?
A
troponin which moves tropomyosin (m for movement) out of the way of MYOSIN HEADS. On the thin filaments.
3
Q
what is the resting and activated [Ca2+] inside skeletal muscle fibres?
A
0.1 micrometers vs 10.
4
Q
what does a motor unit consist of?
A
motor neurone and MUSCLE fibres.
