You Decide to Do an Experiment with Isolated Myofibrils to Explore

question 5

Multiple Choice

You decide to do an experiment with isolated myofibrils to explore the effects of ATP hydrolysis on myofibril function.You do this by bathing the myofibrils in a solution that contains a modified form of ATP, which cannot be split into ADP and P_i. At what step will myofibril function be arrested by using this compound instead of unmodified ATP?

• A)Myosin heads will be unable to bind to the actin filaments.
• B)There will be no block in the cycle, since ATP hydrolysis is not required for this process.
• C)The myosin heads will remain attached to the actin filaments after the power stroke.
• D)Myosin heads will bind to the actin filaments, but the power stroke will not occur and actin filaments will not slide over the myosin filaments.

---

Definitions:

Immediate Reinforcement

The provision of a reward or punishment immediately following a behavior, increasing the likelihood of that behavior being repeated in the future.

Observational Learning

A learning process through watching others, retaining the information, and then later replicating the behaviors that were observed.

Shaping

A process in operant conditioning involving the reinforcement of successive approximations of a desired behavior to teach a new behavior.

Learning Strategy

A planned approach or set of tactics used to facilitate the process of acquiring knowledge or skills.