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.
List and describe the functions of the kidneys. NEPHRONS. Describe the two major portions of a nephron and the capillaries that surround a nephron. In the order that fluid passes through them, list the three main sections of the renal tubule.Distinguish between cortical and juxtamedullary nephrons.escribe three major functions carried out by nephrons and where each of these processes occurs. Describe the parts of the filtration membrane and explain which parts do not allow which substances to go through. List and name the forces that contribute to net filtration pressure (NFP) and explain how NFP is calculated.