NMDA reÂ·cepÂ·tor. a type of glutamate receptor that participates in excitatory neurotransmission and also binds N-methyl-d -aspartate; may be particularly involved in the cell damage observed in individuals with Huntington disease.
â Ultramafic magma is extremely low in silica, with less than 45 percent of the same, but rich in heavier elements like iron and magnesium. It can have a temperature of about 2732 Â°F. It has very low viscosity and thus, its eruptive behavior is gentle.
Building Blocks of The Earthâs Crust. Silicates are the most widespread of the minerals. They are made up of oxygen and silicon the number one and number two most abundant elements in the earth's crust.By themselves they make up over 90% of the weight of the earthâs crust. Most rocks are composed mainly of this class of minerals.There are two forms of silicate when looking at their chemistry:hey are made up of oxygen and silicon the number one and number two most abundant elements in the earth's crust. By themselves they make up over 90% of the weight of the earthâs crust. Most rocks are composed mainly of this class of minerals. There are two forms of silicate when looking at their chemistry: