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. Yellow well water may be caused by iron deposits dissolving and entering into the well system from rain or melting snow. Yellow well water is also known as red-water iron, and it can also contain manganese. Bacteria in water pipes can also mix with iron and cause yellow water stains. Continue Reading.