[Answer] What is a cross bridge?

Answer: The connection of a myosin head group to an actin filament during muscle contraction (the sliding filament theory)
What is a cross bridge?

Crosskeys Bridge – Wikipedia

The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement. According to the sliding filament theory the myosin (thick) filaments of muscle fibers slide past the actin (thin) filaments during muscle contraction while the two groups of filaments remain at relatively constant length. It was independently introduced in 1954 by two research teams one consisting of Andrew F. Huxley and

A bridge is a structure built to span a physical obstacle such as a body of water valley or road without closing the way underneath.It is constructed for the purpose of providing passage over the obstacle usually something that is otherwise difficult or impossible to cross .

The Cross Bay Veterans Memorial Bridge (originally Cross Bay Bridge or Cross Bay Parkway Bridge) is a toll bridge that carries Cross Bay Boulevard a…

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