Multiple Choice
Which type of neuron stimulates muscles to contract?
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4. Tissues & Histology
Introduction to Muscle Tissue
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How many motor neurons typically innervate one muscle fiber?
A
Two
B
Three
C
Four
D
One
Verified step by step guidance1
Understand the concept of motor unit: A motor unit consists of a single motor neuron and all the muscle fibers it innervates.
Recognize that each muscle fiber is typically innervated by only one motor neuron. This allows for precise control of muscle contraction.
Consider the anatomy of the neuromuscular junction: The axon of the motor neuron forms a synapse with the muscle fiber at the neuromuscular junction.
Reflect on the physiological significance: Having one motor neuron per muscle fiber ensures that the signal for contraction is clear and direct, preventing conflicting signals.
Conclude that the correct answer is 'One', as each muscle fiber is typically innervated by a single motor neuron.
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