Match the skeletal muscle protein on the left with its function on the right. Dr
ID: 99847 • Letter: M
Question
Match the skeletal muscle protein on the left with its function on the right. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. nebulin troponin CapZ myomesin tropomyosin myosin actin a-actinin titin Ca^2+-ATPase major component of thin filaments major component of thick filaments binds along the length of thin filaments to regulate myosin head association mediates Ca^2+ regulation of contraction links thick filaments to Z line stabilizes thin filaments M line myosin filament-binding protein bundles parallel arrays of actin filaments at Z line major protein of sarcoplasmic reticulum attaches actin filaments to Z lineExplanation / Answer
1. Actin
2.myosin
3.tropomyosin
4.troponin
5.titin
6. alpha- actinin
7.myomesin
8.nebulin
9.calcium ATPase
10. CapZ
All these proteins listed are involved in the contraction and relaxation of skeletal muscle fibres.
Muscle contraction takes place when myosin heads attach to actin filaments after ATP hydrolysis, forming cross bridges . After which power stroke occurs, during which loss of attached ADP occurs and thin filaments are pulled towards the center of sarcomere, which leads to muscle contraction. Later ATP binds myosin heads, and are then detached from actin filaments.