Thin myofilaments consist of
actin, myosin, troponin
actin, tropomyosin, troponin
actin, tropomyosin, fibrin
actin, myoglobin, troponin
Actin binding sites are located on
(i) Myosin
(ii) Tropomyosin
(iii) Troponin
Arrange the changes during muscle activation as they happen
1. Calcium level increases.
2. Calcium level decreases.
3. Troponin and tropomyosin move to allow myosin to bind to actin.
4. The cross bridge cycle begins.