Which of the following is true?
A. Motor units do not obey the "all or none" law.
B. A threshold stimulus will not affect motor units.
C. Muscle fatigue has no influence on the force of contractions.
D. A subthreshold stimulus causes a muscle contraction.
E. A threshold stimulus will cause contraction of a muscle fiber.
Answer: E
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Answer the following statement true (T) or false (F)
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