Chloride channelChloride channels are a superfamily of poorly understood ion channels specific for chloride. These channels may conduct many different ions, but are named for chloride because its concentration in vivo is much higher than other anions. Several families of voltage-gated channels and ligand-gated channels (e.g., the CaCC families) have been characterized in humans. Voltage-gated chloride channels perform numerous crucial physiological and cellular functions, such as controlling pH, volume homeostasis, transporting organic solutes, regulating cell migration, proliferation, and differentiation.
MineralIn geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form. The geological definition of mineral normally excludes compounds that occur only in living organisms. However, some minerals are often biogenic (such as calcite) or organic compounds in the sense of chemistry (such as mellite). Moreover, living organisms often synthesize inorganic minerals (such as hydroxylapatite) that also occur in rocks.
BasaltBasalt (UKˈbæsɔːlt,_-əlt; USbəˈsɔːlt,_ˈbeɪsɔːlt) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year.
Lime (material)Lime is an inorganic material composed primarily of calcium oxides and hydroxides, usually calcium oxide and/or calcium hydroxide. It is also the name for calcium oxide which occurs as a product of coal-seam fires and in altered limestone xenoliths in volcanic ejecta. The International Mineralogical Association recognizes lime as a mineral with the chemical formula of CaO. The word lime originates with its earliest use as building mortar and has the sense of sticking or adhering.
MetasomatismMetasomatism (from the Greek μετά metá "change" and σῶμα sôma "body") is the chemical alteration of a rock by hydrothermal and other fluids. It is the replacement of one rock by another of different mineralogical and chemical composition. The minerals which compose the rocks are dissolved and new mineral formations are deposited in their place. Dissolution and deposition occur simultaneously and the rock remains solid. Synonyms of the word metasomatism are metasomatosis and metasomatic process.
GeophagiaGeophagia (ˌdʒiːəˈfeɪdʒ(i)ə), also known as geophagy (dʒiˈɒfədʒi), is the intentional practice of eating earth or soil-like substances such as clay, chalk, or termite mounds. It is a behavioural adaptation that occurs in many non-human animals and has been documented in more than 100 primate species. Geophagy in non-human primates is primarily used for protection from parasites, to provide mineral supplements and to help metabolize toxic compounds from leaves.
Tenth gradeTenth grade (also 10th Grade or Grade 10) is the tenth year of formal or compulsory education. It is typically the first year of high school. In many parts of the world, students in tenth grade are usually 15 or 16 years of age. For most Australian states, Year 10 is the fourth year of a student's high school education. However, in the Northern Territory, it is the first year of senior school, which occurs after high school. While in contrast, in most South Australian public schools, it is the third year of high school.
Eleventh gradeEleventh grade (also known as 11th Grade, Grade 11 or Junior year) is the eleventh year of formal or compulsory education. It is typically the third year of high school (and is the final year in some countries). Students in eleventh grade are usually 16-17 years of age. In Australia, Year 11 is the twelfth year of education and fifth year of high school education. Although there are slight variations between the states, most students in Year 11 are aged around fifteen, sixteen or seventeen.
SystemA system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and is expressed in its functioning. Systems are the subjects of study of systems theory and other systems sciences. Systems have several common properties and characteristics, including structure, function(s), behavior and interconnectivity.
Twelfth gradeTwelfth grade (also known as 12th grade, grade 12, or senior year) is the twelfth year of formal or compulsory education. It is typically the final year of secondary school in most parts of the world. Students in twelfth grade are usually 17–18 years old. Some countries have a thirteenth grade, while other countries do not have a 12th grade/year at all. In Australia, the twelfth grade is referred to as Year 12. In New South Wales, students are usually 16 or 17 years old when they enter Year 12 and 17 or 18 years during graduation (end of year).
