Muscle Contraction Results from the Repeated Cycle of Interactions Between

question 46

Multiple Choice

Muscle contraction results from the repeated cycle of interactions between myosin and actin. What is the last step of this cycle, after which the cycle starts over again?

• A) New ATP molecules bind to the myosin heads, causing them to disengage from the actin.
• B) The myosin heads split the ATP into ADP and P_i and store the energy.
• C) The myosin head bends (the power stroke).
• D) Myosin heads extend toward the Z lines at the ends of the sarcomere.

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Definitions:

Degrees of Freedom

The number of values in a calculation that are free to vary without violating any constraints.

Significant Result

A statistical outcome that indicates a low probability of observing the obtained findings by chance, suggesting the result is not due to random variation.

Meaningful Result

An outcome of statistical analysis that provides significant insight or implications, often influencing decision-making or hypothesis testing.

Effect Size

A quantifiable measure of the magnitude of a phenomenon or the strength of a relationship in a statistical analysis.