Which large elastic protein anchors the thick filaments to the Z-disc and helps the sarcomere return to its resting length?
Show answer and explanation
Correct answer: Titin
Titin is the largest known protein and acts as a molecular spring. It provides passive elasticity to the muscle and keeps the thick filaments centered within the sarcomere.
Keep practicing
More Muscle Contraction questions
- In smooth muscle, calcium binds to which protein instead of troponin to initiate contraction?
- What characterizes a 'Motor Unit'?
- Which enzyme is responsible for 'resetting' the myosin head into its high-energy, cocked position?
- The 'Triad' in skeletal muscle consists of which three structures?
- During muscle relaxation, how are calcium levels in the sarcoplasm reduced?
- What is the primary neurotransmitter released at the neuromuscular junction?