This figure shows the three main locations of acetylcholine receptors: CNS receptors (muscarinic and nicotinic): cholinergic neurotransmission at the CNS level is thought to regulate sleep, wakefulness, and memory. Two clinical situations depict the role of acetylcholine in CNS: - Acetylcholinesterase inhibitors are used in the treament of Alzheimerâs disease and other dementias.
The Cause Of Bacteria Contamination in Well Water Poor well construction If you have a bedrock well, bacteria contamination could be caused by a buried well head or an inadequate well cap.
Often the biggest contamination threats are things in your own backyard. The following are examples of potential problems and some ways to prevent them. Poor Well Construction. The fastest way to contaminate groundwater is through a well. A well provides a direct path for contamination to travel from the surface to the aquifer. An inadequate well casing or annular seal may allow surface water or contaminated groundwater to seep along the outside of the casing and enter your well (see Figure 1, Annulus or Casing Seal).