Figure 10-2 Muscle Contractions

question 5

Multiple Choice

Figure 10-2 Muscle Contractions
Use Figure 10-2 to answer the following question:
-What is thought to happen in a muscle during the response shown in graph (a) ?

• A)It is getting stronger 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.

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