The Motor Unit Is the Elementary Functional Unit of the Peripheral

question 2

Multiple Choice

The motor unit is the elementary functional unit of the peripheral nervous system.What are its four elements?

• A) The cell body of the motor neuron in the anterior horn of the spinal cord; the axon of the motor neuron, which travels via spinal nerves and peripheral nerves to muscle; the neuromuscular junction; and the muscle fibers innervated by the neuron
• B) The spinal nerve, the peripheral nerve, the neuromuscular junction, and the muscle fibers
• C) The cell body of the motor neuron in the posterior spinal cord, the dorsal root, the peripheral nerve, and the muscle fibers
• D) The synaptic junction, the anterior spinal cord, the neuromuscular junction, and the muscle fibers

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