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Questions and Answers
What is a motor unit?
What is a motor unit?
- The connection between a motor neuron and a muscle fiber
- A group of muscle fibers controlled by one motor neuron (correct)
- A type of muscle fiber found in the eyes
- The nerve that controls voluntary muscle movement
Where are small motor units typically found?
Where are small motor units typically found?
- In the muscles controlling breathing
- In the muscles controlling walking and running
- In the muscles controlling eye movements (correct)
- In the muscles controlling finger movements
What is the function of the neuromuscular junction?
What is the function of the neuromuscular junction?
- To provide a connection between motor neurons and muscle fibers (correct)
- To store energy for muscle contraction
- To regulate heart rate
- To remove waste products from the muscles
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Study Notes
Motor Units and Neuromuscular Junction
- A motor unit is the smallest functional unit of muscle contraction, consisting of a motor neuron and the muscle fibers it innervates.
- Small motor units are typically found in muscles that require precise control, such as those involved in eye movements, facial expressions, and finger movements.
- The function of the neuromuscular junction is to transmit signals from the motor neuron to the muscle fibers, resulting in muscle contraction.
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