Ascorbic acid transpo in cornea is mediated by: (A) Carbonic anhydrase pump, (B) Na K pump, (C) Myoinositol pump, (D) Passive diffusion
Answer is B. Metabolism of Cornea *Main Metabolic pathway: Aerobic *Ascorbic acid transpo: Na K ATPase > Myoinositol *Cornea becomes edematous due to lactate accumulation that happens during hypoxic conditions such as prolonged contact lens use. *Oxygen is derived from environment & glucose from aqueous humor. *Vitamins and amino acids are also provided by the limbal cappilaries