Contraction
Contraction occurs by the mechanism of the sliding filament theory. This refers to the overlapping of actin and mysoin protein filaments. Mysoin heads bind to the mysoin binding sites on the actin filament and push the actin filaments towards the centre of the sarcomere, this is the power stroke and results in muscle contraction.[1]
Reference
- Silverthorn, D (2012). Human Physiology. 6th ed. United States: Pearson. 406-407