During regulatory volume decrease, many cells will increase:: (A) Their volume, (B) Influx of Na+, (C) Efflux of K+, (D) Synthesis of sorbitol
Answer is C. Ans. C. Efflux of K+a. K+ is the major intracellular ion; efflux of K+ will produce an osmotic flow of water out of the cell.b. Water exit will lead to a decrease in cell volume.c. An influx of Na+ and synthesis of sorbitol do not occur during this process because both processes would increase intracellular osmolytes and drive water into the cell, increasing cell volume.