Which Statement Concerning Cross Bridges Is INCORRECT

question 161

Multiple Choice

Which statement concerning cross bridges is INCORRECT?

• A) Cross bridges are the globular heads of myosin molecules.
• B) Cross bridges have actin binding sites that are normally covered by troponin and tropomyosin except during excitation-contraction coupling.
• C) Cross bridges bind with actin and then bend to pull the thin filaments inward during contraction according to the sliding filament mechanism.
• D) Mg2+ is necessary to bind ATP to the cross bridge.

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Definitions:

Racial Identity Development

The process by which individuals understand and become aware of the significance and influence of race in their lives and in society.

Ethnic Group

A community or population made up of people who share a common cultural background or descent.

Stress

refers to a state of mental or emotional strain resulting from adverse or demanding circumstances.

Historic Trauma

Psychological distress passed down through generations, resulting from catastrophic events experienced by ancestral groups.