Windows 10: What is the $WINDOWS.~BT folder used for? This folder is used by the Windows 10 Updater, it contains update logs and files downloaded by the Windows update process. How to delete the $WINDOWS.~BT folder? The folder can be deleted e.g. when an upgrade from windows 7 / 8 to Windows 10 failed and you want to free up space on the hard disk.
Two Types of Receptors. There are two types of acetylcholine receptors (AChR) that bind acetylcholine and transmit its signal: muscarinic AChRs and nicotinic AChRs, which are named after the agonists muscarine and nicotine, respectively.
Research has also shown that one molecule of acetylcholine must bind to each of the two alpha subunits for this central channel to open. Nicotinic receptors at neuromuscular junctions are not the only place in the nervous system where acetylcholine plays a role. It is also active at many other locations, where it can bind to another, very different type of receptor.