<prompt> Atropine is derived from which of the following plant?Atropa belladonnaHyoscyamus nigerDatura stramoniumArgemone mexicana  <response>: Plants and mushrooms containing anticholinergic alkaloids include Jimsonweed Datura stramonium Deadly nightshade Atropa belladonna Fly agaric Amanita muscaria The root of Atropa belladonna contains 82-97 of hyoscyamine, 3-15 atropine, and up to 2.5 scopolamine. Anticholinergic agents competitively antagonize the effects of acetylcholine at peripheral muscarinic and central receptors. Ref: Manning B.H. 2012. Chapter 13. Anticholinergics. In K.R. Olson Ed, Poisoning Drug Overdose, 6e. 