thin filament
[/θɪn ˈfɪləmənt/]
nounpl: thin filaments
filamento fino
1. A protein structure in muscle cells composed primarily of actin molecules, which interacts with thick filaments to produce muscle contraction
The thin filament slides along the thick filament during muscle contraction in the sliding filament theory.
O filamento fino desliza ao longo do filamento espesso durante a contração muscular na teoria do filamento deslizante.
2. In cell biology, a component of the sarcomere that extends from the Z-disc and contains regulatory proteins tropomyosin and troponin
Calcium binds to troponin on the thin filament, allowing muscle contraction to occur.
O cálcio se liga à troponina no filamento fino, permitindo que a contração muscular ocorra.
This is a specialized scientific term used in muscle physiology and cell biology education. The term is identical in both Brazilian Portuguese and European Portuguese academic contexts. It is primarily used in medical, biological, and sports science fields, and is not part of everyday conversational language in either English or Portuguese-speaking cultures.
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