What Is the Correct Sequence for the Following Events of Muscle

question 23

Multiple Choice

What is the correct sequence for the following events of muscle contraction?
1) Calcium ions are released from the sarcoplasmic reticulum.
2) Power stroke pulls actin toward center of A band.
3) Impulse travels into the T-tubules.
4) Energized myosin heads attach to actin.
5) Calcium reacts with troponin and exposes binding sites on actin.

• A) 1, 3, 5, 2, 4
• B) 3, 1, 5, 4, 2
• C) 1, 5, 4, 2, 3
• D) 3, 5, 4, 2, 1
• E) 2, 4, 5, 3, 1

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Definitions:

Healthy Individuals

Persons who are in a state of physical, mental, and social well-being, not merely the absence of disease or infirmity.

Positive Feedback

A process where a change in a variable triggers mechanisms that amplify that change.

Negative Feedback

A control system where a trigger produces a contrary effect to sustain an optimal state of the regulated subject.

Healthy Individuals

Persons having a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity.