sentence: Many neurotoxins act by affecting voltage-dependent ion channels.
sentences_before: Many of the venoms and other toxins that organisms use in defense against vertebrates are neurotoxins. A common effect is paralysis, which sets in extremely rapidly. The venom of bees, scorpions, pufferfish, spiders and snakes can contain many different toxins.
concept_name: neurotoxin
headings: Neurotoxin
categories: Physiology