Evidence for Na+/H+ and Cl−/HCO3− Exchanges During Independent Sodium and Chloride Uptake by the Larva of the Mosquito Aedes Aegypti (L.)

Ionic movements into and out of the starved salt-depleted fourth instar larvae of Aëdes aegypti have been studied during independent uptake of Na+ and Cl−. About 33% of the Na+ taken up from Na2SO4 is balanced electrically by a loss of K+, about 49% is exchanged for H+, and about 17·5% is accompanied by SO4−2. About 36% of the Cl− taken up from KCl is presumably balanced electrically by a loss of unknown and possibly organic ions, about 41% is exchanged for HCO3− (and possibly OH−) and about 23% is accompanied by K+.