1 Symptoms are due to the effects of excess acetylcholine on nicotinic and muscarinic acetylcholine receptors in the CNS, at neuromuscular junctions, and in the sympathetic, and parasympathetic nervous systems. 2  Nicotinic and muscarinic receptors have different. 3  Functions. 4  Locations.
The reason snake repellents don t work is because there is nothing intimidating to a snake about the smell of naphthalene or sulfur. Even if there were, snakes do not smell the way people traditionally assume they do. Snakes use smell as a method of information.
While these devices may seem to work initially, their effectiveness is not proven. The good news is that there are rodent control methods that deter rodents from your home and landscape and donât involve using poisons or traps. How Sound Repellents Work According to their manufacturers, sound repellent devices emit high-frequency sound waves to frighten or repel rodents such as mice, rats, moles, squirrels and gophers.