Science, asked by plantpro125, 11 months ago

Which myofilament extends the entire length of the A band? *

Answers

Answered by rajjbpathan
0

Answer:

Alignment of Myofilaments, Sarcomeres, and Myofibrils

Alignment of Myofilaments, Sarcomeres, and MyofibrilsThick myofilaments are attached to Z lines by small filaments composed of the protein titin (Labeit et al., 1997; Maruyama, 1999). The titin filaments arise near the M line within the axes of the thick filaments and span the length of the thick filament as well as the I-band region to attach to the Z line. Within the I-band region, the titin filaments provide an elastic attachment to the Z line, which imparts a passive elasticity to sarcomeres. Myosin-binding proteins attach to the thick filaments and titin and appear to serve a structural role as well as a role in myofibrillogenesis. An additional protein, nebulin, forms small filaments that run the length of thin myofilaments and may regulate the length of thin myofilaments. The M line within the sarcomere stabilizes the thick filament lattice by linking neighboring filaments to each other and has an enzymatic role as well. It is composed of creatine kinase, myomesin, and M protein (Craig and Padron, 2004).

Alignment of Myofilaments, Sarcomeres, and MyofibrilsThick myofilaments are attached to Z lines by small filaments composed of the protein titin (Labeit et al., 1997; Maruyama, 1999). The titin filaments arise near the M line within the axes of the thick filaments and span the length of the thick filament as well as the I-band region to attach to the Z line. Within the I-band region, the titin filaments provide an elastic attachment to the Z line, which imparts a passive elasticity to sarcomeres. Myosin-binding proteins attach to the thick filaments and titin and appear to serve a structural role as well as a role in myofibrillogenesis. An additional protein, nebulin, forms small filaments that run the length of thin myofilaments and may regulate the length of thin myofilaments. The M line within the sarcomere stabilizes the thick filament lattice by linking neighboring filaments to each other and has an enzymatic role as well. It is composed of creatine kinase, myomesin, and M protein (Craig and Padron, 2004).At the periphery of myofibrils, adjacent Z lines within the same sarcomere are connected by intermediate filaments of desmin. Also, intermediate filaments of desmin encircle the circumference of Z lines and appear to form linkages with Z lines of adjacent myofibrils to aid in the alignment of sarcomeres in register with adjacent myofibrils.

plzz mark as brainlist

Similar questions