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.
Quick Answer. There are numerous possible causes for cloudy well water, including surface water leaking into the well or a faulty well filter or pump. Cloudy drinking water also could be due to air bubbles trapped in the water, although the water should quickly clear up if this is the case. Continue Reading.