Part A
In this activity, why did the muscle force decrease over time?
In this activity, why did the muscle force decrease over time?
Muscle fatigue developed.
The stimulation frequency was decreased.
Intracellular calcium built up.
The stimulation frequency was increased.
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Part B
Which of the following describes how increasing the duration of the rest period affected muscle tension?
Which of the following describes how increasing the duration of the rest period affected muscle tension?
Increasing the duration of the rest period increased the duration of the subsequent maximal tension.
Increasing the duration of the rest period decreased the duration of subsequent maximal tension.
Increasing the duration of the rest period had no effect on the subsequent maximal tension.
Increasing the duration of the rest period decreased the amount of the subsequent maximal tension.
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Part C
What might be occurring on a molecular level during the rest periods?
What might be occurring on a molecular level during the rest periods?
Intracellular calcium is decreasing.
Intracellular lactic acid is increasing.
Intracellular ADP and inorganic phosphate are decreasing.
Muscle fatigue is increasing.
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