Which of These Factors Is Involved in the Gradation of Muscle

question 141

Multiple Choice

Which of these factors is involved in the gradation of muscle contraction?

• A)greater number of muscle fibres
• B)variation in the frequency of action potentials initiated in each muscle fibre
• C) variation in the size of the action potentials initiated in each muscle fibre
• D) variation in the distance action potentials can travel