QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
Which statement best defines a motor unit?
A. A motor nerve and the muscle cells it stimulates
B. A nerve supplying a muscle originating from the spinal cord
C. Branches located in each individual muscle cell
D. Single nerves found in each muscle
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Answer
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Step 1I'll solve this problem step by step, following the specified formatting guidelines:
Step 2: Understand the Concept of a Motor Unit
A motor unit is a fundamental functional unit in muscle physiology that consists of a motor neuron and all the muscle fibers it innervates (stimulates). This means the motor unit includes both the nerve and the specific muscle cells it controls.
Final Answer
A (A motor nerve and the muscle cells it stimulates)
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