Which of the Following Statements Best Describes the Power Stroke

question 44

Multiple Choice

Which of the following statements best describes the power stroke of muscle contraction?

• A)The myosin head bends,pulling the thin filament toward the center of the sarcomere.
• B)The actin head bends,pulling the thin filament toward the center of the sarcomere.
• C)The myosin head bends,pulling the thick filament toward the center of the sarcomere.
• D)The actin head bends,pulling the thick filament toward the center of the sarcomere.

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Definitions:

Kinetic Energy

The energy possessed by an object due to its motion, calculated as one half the mass times the velocity squared.

Reaction Sites

Specific regions on a molecule where a chemical reaction occurs or is facilitated.

Particle Orientation

The specific alignment or direction of particles' axes relative to each other or to external fields, influencing their reactions and properties.

Kinetic Energy

The energy that an object possesses due to its motion, calculated as half the mass times the velocity squared.