Metamorphic grade refers to the temperature and pressure under which a rock was metamorphosed, considered low grade or high grade. Since metamorphic minerals in a rock form under specific conditions, they are used to identify the temperature and pressure of the metamorphic conditions.rotolith or parent rock is the rock type that a metamorphic rock was before it was subjected to metamorphic conditions.
Filtration occurs at the glomerulus, essential a highly coiled loop of tubular cells. Each kidney has millions of these cells. Arterial blood is pumped into the glomerulus. Water and ions are filtered via an osmotic gradient as well as other waste products.
filtration barrier. the physiological function which limits the passage of small molecules through the renal corpuscle. glomerular filtration. the process by which glomerular filtrate is formed, involving the balance of pressures across the walls of the glomerular capillaries.lomerular. pertaining to or of the nature of a glomerulus, especially a renal glomerulus. glomerular basement membrane. the structure located between endothelial cells of renal capillaries and the visceral epithelial cells of the glomerulus. It functions as a barrier to filtration of large molecules.