Which component of a standard somatic reflex arc is responsible for transmitting action potentials from the central nervous system to the peripheral effector muscle?
Answer and explanation
Correct answer: C. Efferent motor neuron
A reflex arc comprises: sensory receptor -> afferent (sensory) neuron transmitting impulses to the CNS -> integrating center (often including interneurons in the spinal cord) -> efferent (motor) neuron carrying impulses away from the CNS -> effector organ (muscle or gland).
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