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.
DEET (N,N-diethyl-3-methylbenzamide) is a reliable and highly effective insect repellent. The chemical has been in public use since 1957. The repellent is sold under numerous brand names and comes in lotion, spray and many other forms.Concentrations of DEET range from about 5% all the way up to 100%.epellents, clothing, netting and other personal protection measures can help prevent mosquito bites and the diseases they carry. Insect repellents are effective and safe when properly used.