NMDA receptor. NMDA receptors (NMDAR), glutamate receptors are the predominant molecular device for synaptic plasticity and to control the memory function.
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field.
Magnets are usually made from metals (such as iron) or alloys (mixtures of metals, or of a metal and a nonmetal). Magnets come in different strengths, often measured in units called gauss (G) or, alternatively, units called tesla (T; 1 T = 10,000 G).