Metamorphic grade is a general term for describing the relative temperature and pressure conditions under which metamorphic rocks form. As the temperature and/or pressure increases on a body of rock we say that the rock undergoes prograde metamorphism or that the grade of metamorphism increases.he original rock that has undergone metamorphism is called the protolith. Protolith can be any type of rock and sometimes the changes in texture and mineralogy are so dramatic that is difficult to distinguish what the protolith was. 1  Note that diagenesis and weathering are also a changes in form that occur in rocks.
Within the nephron (the functional unit of the kidneys), filtration occurs in the glomerolus. The filtered fluid is called filtrate. Reabsorption of filtrate occurs in a few places within the nephron, however, the majority of reabsorption takes place in the proximal convoluted tube.
In Health. Reabsorption in a nephron occurs in the Loop of Henle Reabsorption has been addressed to substances which are absorbed back from the nerphrone back in to the blood(capillaries â¦).On other hand Secretion is the absorption of substances from blood.Renal Corpsicule-water, solute filtration Proximal Convoluted Tubule-Reabsorption of water, glucose, amino acids and some minerals. Secretion for H, Ammonia, Urea and Creatinine Loop of Henle-Reabsoprtion of water and minerals, secretion of Urea.n Health. Reabsorption in a nephron occurs in the Loop of Henle Reabsorption has been addressed to substances which are absorbed back from the nerphrone back in to the blood(capillaries â¦).