question: In humans what links motor neuron?
choices.text: Muscles A hinged joint nerve pathways vital to a good life nerve pain backbones physical properties Muscles contracting
choices.label: A B C D E F G H
formatted_question: In humans what links motor neuron? (A) Muscles (B) A hinged joint (C) nerve pathways (D) vital to a good life (E) nerve pain (F) backbones (G) physical properties (H) Muscles contracting