Respuesta :
Answer:
The actin filament is the site of attachment for the myosin cross bridge. The myosin cross-bridge attaches to the actin filament and pulls it towards the center of the sarcomere.
During muscle contraction, myosin cross bridges attach to actin filaments on an actin-binding site. This is called a myosin active site.
Explanation:
Actin filaments are long, thin, and filamentous structures that are found in the cytoplasm of muscle cells.
They are responsible for the structural integrity of muscle cells, and they also play a role in regulating the contraction of muscles.
These filaments have many myosin binding sites on them, and when these sites are occupied by myosins, they bind to one another and cause the actin filaments to slide past each other. This process is called cross-bridge cycling and it causes muscular contraction.
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