Figure 9-2
-What is thought to happen in a muscle during the response shown in graph (a) ?
A) It is strengthening with exercise.
B) There is a gradual increase in the concentration of calcium ions in the sarcoplasm.
C) It is fatigued and must make repeated efforts to twitch normally.
D) It is aged and has lost contractile proteins.
E) It is producing more ATP as tension increases.
Correct Answer:
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