Least diffusible ion among following ?: (A) Na', (B) K+, (C) Cl-, (D) Urea
Answer is A. Ans. is'a'i.e., Na+Permeability coefficient & permeability of some impoant molecules in increasing order of frequency are Na+< K+< Cl- < Glucose < Tryptophan < Urea = Glycerol< Indole < H2O.