Which of these chemicals paralyzes skeletal muscle by binding to the acetylcholine receptor sites

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Curare is a naturally occurring alkaloid that specifically binds to the acetylcholine receptor sites on the skeletal muscles, preventing acetylcholine from binding and inducing muscle contractions. This leads to paralysis of the skeletal muscles. Black widow spider venom and organophosphates act on the nervous system but not specifically on the acetylcholine receptors. DDT affects the sodium ion channels in neurons but not the acetylcholine receptors.

Which of These Chemicals Paralyzes Skeletal Muscle by Binding to the Acetylcholine