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.
There are at least seven causes of water retention. Most cases of water retention are due to âidiopathic oedema (edema)â which simply means that the water retention is not being caused by a specific disease. In most cases the cause is reversible by changing what you eat and how you exercise. Read the sections below to see what kind of water retention you have.