Fig. 3. Effects of 500 µmol l1 cyclic guanosine monophosphate
(cGMP) on transepithelial fluid secretion (A), on the concentrations of
Na+, K+ and Cl in secreted fluid (B),
and on transepithelial rates of Na+, K+ and
Cl secretion in isolated Malpighian tubules of A.
aegypti (C). Values are means ± S.E.M.; N=24
tubules (A), N=12 tubules (B,C); *P<0.05,
paired Student's t-test.