Muscle relaxants work by preventing acetylcholine from attaching to its receptor .
Acetylcholine , the natural neurotransmitter at the neuromuscular junction , causes muscles to contract when it is released from nerve endings .
Muscle relaxants work by preventing acetylcholine from attaching to Acetylcholine 's receptor .
Acetylcholine , the natural neurotransmitter at the neuromuscular junction , causes muscles to contract when it is released from nerve endings .