Which filament is thick?

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Multiple Choice

Which filament is thick?

Explanation:
In muscle, thick filaments are made mostly of myosin. Myosin molecules have long tails with many globular heads that extend outward to form cross-bridges with the thin filaments (actin) during contraction, powered by ATP hydrolysis. Actin forms the thin filaments; titin acts as an elastic spring anchoring and stabilizing the structure, and nebulin helps set the length of the thin filaments. So the filament that is thick is myosin.

In muscle, thick filaments are made mostly of myosin. Myosin molecules have long tails with many globular heads that extend outward to form cross-bridges with the thin filaments (actin) during contraction, powered by ATP hydrolysis. Actin forms the thin filaments; titin acts as an elastic spring anchoring and stabilizing the structure, and nebulin helps set the length of the thin filaments. So the filament that is thick is myosin.

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