The figure below shows the two main families of acetylcholine receptors: muscarinic and nicotinic. In structural terms, muscarinic receptors are G-coupled protein receptors, while nicotinic receptors are ligand-gated ion channels. They can be found on both sides of the synaptic cleft (presynaptic and postsynaptic).
After the pressure drops below 40 psi, the electrical switch turns on the pump and the pressure in the tank increases. Any failure in any component or loss of electricity can cause a well to suddenly stop producing water when a faucet is turned on.
Bad Water Tastes and Odors. Sometimes drinking water may have a salty taste, which can be caused by a number of issues. If you live near the coast, your well water may be contaminated by seawater intrusion. Well water can also become contaminated by road salt in runoff.