Problem: Do you know what some spiders, snakes, scorpions, bees, mussels, and pufferfish have in common? Well, besides, scaring you, these animals have poisons that act on the nervous system. These poisons call neurotoxins are used by the animals for protection against predators or for capturing prey. Although many people are afraid of snakes, only about 8,000 people in the United States are bitten by venomous snakes each year. Of those bitten, about 12 to 15 people die. The venom of many cobras contains a potent neurotoxin that binds to ligand-gated Na+ channels, causing them to open. Unlike ACh, which binds to and then rapidly unbinds from ligand-gated Na+ channels, the neurotoxin tends to remain bound to ligand-gated Na+ channels. How does this neurotoxin affect the nervous system's ability to stimulate skeletal muscle contraction? How does it affect the ability of skeletal muscle fibers to respond to stimulation? (Be sure to explain how ligand-gated channels work in your response.) Choose any other organism that utilizes a neurotoxin in its defense and explain it mode of neuronal action and the overall effect on the nervous system. There are several to choose from so be creative and discuss something interesting or intriguing that we may not encounter often or some organism that may not be a part of our environment. You can choose from any of the six kingdoms of life as well.