Biconcave shape of RBC is useful in all aspects except:: (A) Helps in passing through capillaries, (B) Helps in cellular metabolism, (C) Increased surface area diffusion of gases, (D) Prevent osmotic lysis
Answer is B. Ref: Pal GK. Red Blood Cells. In: Textbook of Medical Physiology. Ahuja Publishing House. 2007: 8: 63.Explanation:Advantages of biconcavity of RBCsWithstand lysis when exposed to hypotonic environmentBetter exchange of gasEasy movement through capillariesMetabolism in RBCNo nuclei, mitochondria, ribosomesTCA cycle is absentGlucose oxidation - 90% - Embden - Mayerhoff pathway: 10% - HMP shunt