★ The Musculoskeletal System Quiz
What is a motor unit?
A. A motor neuron and all of the skeletal muscle fibers it stimulates
B. A contractile unit of a muscle fiber
C. The tissue that surrounds the muscle fiber
D. The junction between the muscle cell and neuron
Preview next quiz:
What is the main function of the hamstring group of muscles?
A. Flex the knee
B. Extend the hip
C. Extend the knee
D. Flex the knee and extend the hip
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