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Question

The cross bridges involved in muscle contraction are located on the ________________.


A

myosin myofilaments

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B

actin myofilaments

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C

tropomyosin

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D

dystrophin

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Solution

The correct option is A

myosin myofilaments


The myosin heads are known as cross-bridges because they can bind to and move along actin in the thin filament. It is this actin-myosin interaction that is the molecular basis for force generation and movement in muscle cells.

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