A Reflectional Symmetry is a type of symmetry in which one half of the object is the mirror image of the other. 1  A figure may have both horizontal and vertical lines of reflection. 2  The alphabet V has reflectional symmetry about a vertical line of reflection.  The hexagon has reflectional symmetry about both horizontal and vertical lines of reflection.
RENAL REGULATION OF BICARBONATE. The kidneys regulate the [HC03-] by. 1) conserving or excreting the HC0 3 - present in the glomerular ultrafiltrate; 2) producing new HCO3- which enters the body fluids as the kidneys excrete ammonium salts and titratable acids (this sum is called net acid) in the urine.
Where one plate is being subducted under another, chambers of magma may form. These magma bodies feed the volcanic islands that mark subduction zones. Although most volcanic activity takes place at plate boundaries, volcanism also can occur within the plate interiors at hotspots. Hotspots are thought to be from large âplumesâ of extremely hot material rising from deep in Earth's interior.