In the sarcomere there are organised actin and myosin blocks. Troponin and tropomyosin also appear associated to actin.
The actin molecules when activated by calcium ions liberated in the proximities of the sarcomere are pulled by myosin molecules. This interaction between actin and myosin shortens the myofibrils originating the phenomenon of muscle contraction.
What are the main proteins that constitute the sarcomere? What is the function of those molecules in the muscle cells?
Answers
Mr.Sunil Jain
The actin molecules when activated by calcium ions liberated in the proximities of the sarcomere are pulled by myosin molecules. This interaction between actin and myosin shortens the myofibrils originating the phenomenon of muscle contraction.