A single motor neuron supplying only a few fibres allows fine control. Such an arrangement is a:
ASmall motor nerve
BShort motor path
CSlow motor route
DSmall motor unit
Answer & Solution
Correct answer: D. Small motor unit
1. Motor unit size varies with what the muscle must do.
2. Fewer fibres per neuron means finer gradation of force.
3. That arrangement is a small motor unit.
_Source: OpenStax Anatomy and Physiology 2e, Chapter 10, Muscle Tissue._
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