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.
Examples of global bifurcations include: 1  Homoclinic bifurcation in which a limit cycle collides with a saddle point. 2  Heteroclinic bifurcation in which a limit cycle collides with two or more saddle points. 3  Infinite-period bifurcation in which a stable node and saddle point simultaneously occur on a limit cycle.