Skin, Skeleton, and Muscles Question
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Which of the following statements regarding whole-muscle contraction is true?
- The order of recruitment of motor units in a muscle is such that the last units recruited are the first to experience fatigue
- The order of recruitment of motor units in a muscle is such that the first units recruited generate the most tension
- Motor units whose motor neurons have small-diameter cell bodies contract first, followed by motor units with larger-diameter motor neurons
- Both the order of recruitment of motor units in a muscle is such that the last units recruited are the first to experience fatigue and the order of recruitment of motor units in a muscle is such that the first units recruited generate the most tension are true
- Both the order of recruitment of motor units in a muscle is such that the last units recruited are the first to experience fatigue and motor units whose motor neurons have small-diameter cell bodies contract first, followed by motor units with larger-diameter motor neurons are true