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Each skeletal muscle fiber is controlled by a motor neuron at a singleQuestion 6Select one:a.synaptic cleft.b.neuromuscular junction.c.synaptic knob.d.sarcomere.e.transverse tubule.

Question

Each skeletal muscle fiber is controlled by a motor neuron at a singleQuestion 6Select one:a.synaptic cleft.b.neuromuscular junction.c.synaptic knob.d.sarcomere.e.transverse tubule.

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Solution

Each skeletal muscle fiber is controlled by a motor neuron at a single neuromuscular junction.

Here's the step by step explanation:

  1. The nervous system controls skeletal muscle fibers through motor neurons.

  2. Each motor neuron originates from the spinal cord and extends to a group of muscle fibers.

  3. The point where the motor neuron and muscle fiber meet is called the neuromuscular junction.

  4. At the neuromuscular junction, the motor neuron sends a signal (or impulse) to the muscle fiber.

  5. This signal causes the muscle fiber to contract or relax, depending on the nature of the signal.

So, the correct answer is b. neuromuscular junction.

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