<prompt> A herpetologist is bitten by a poisonous snake and is taken to the emergency depament with progressive muscle paralysis. The venom is probably incapacitating hisNa channelsCa2 channelsPhospholipidsAcetylcholine receptors.  <response>: Snake venom usually blocks acetylcholine receptors, preventing depolarization of the muscle cell. The Na and Ca2 channels are not incapacitated by snake venoms 