ABSTRACT
Sodium and lithium are actively transported by the isolated midgut of Hyalophora cecropia.
The short-circuit current in 32 mM sodium solution is about half of that in 32 mm potassium solution.
The sodium flux measured with 22Na from blood-side to lumen accounts for all of the short-circuit current and is 19 times the flux from lumen to blood-side.
In a solution containing 16 mm potassium and 16 mm sodium there is no transport of sodium, although a large current remains.
The sodium transport mechanism is not sensitive to ouabain.
Copyright © 1971 The Company of Biologists Ltd.
1971
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