countercurrent

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countercurrent

 [kown´ter-ker″ent]
flowing in an opposite direction.

count·er·cur·rent

(kown'ter-ker'ent),
1. Flowing in an opposite direction.
2. A current flowing in a direction opposite to another current.

countercurrent

/coun·ter·cur·rent/ (-kur″ent) flowing in an opposite direction.

countercurrent

a change in the direction of flow of a fluid. An example is the countercurrent in the ascending branch of a kidney tubule where osmolality undergoes a reversal after a gradual change in sodium chloride concentrations.

countercurrent

flowing in an opposite direction.

countercurrent exchanger
a countercurrent system in which transport between the inflow and the outflow is passive.
countercurrent multiplier
a mechanism that enables a membrane to absorb much more solute than water so that the residual fluid has a lower osmotic pressure. The classical example of this phenomenon is the loop of Henle in the kidney. Called also countercurrent multiplier mechanism or system.
References in periodicals archive ?
Children may learn science as nothing but a big book of facts (and religion an equally big book of rules), but those who practice know that both science and religion are an often exhilarating whirlwind of arguments and countercurrents as we struggle to fit a structure that we think we have confidence in, around what we experience every day in our labs and in our lives.
I just let the boat drift when I was sleeping," he said, which caused a problem when he ran into countercurrents near the equator.
But Astaire structures it with such impeccable musicality--sometimes working against the rhythm and creating percussive countercurrents with his footwork--and performs with such low-key showmanship that he is utterly persuasive.
Ultimately, listening to such brand currents and countercurrents may be more valuable than anything brands may say about themselves.
endured the countercurrents of the 1960's as much as any other city
Matthew offers us more than enough to affirm God's goodness as compassion and to discern the life-giving countercurrents alive in our world today.
While the music expands the characters' feelings at certain moments, Williams speaks also of specific scenes wherein it creates ironic countercurrents.
This approach allows him to locate cross- and countercurrents that make the Enlightenment considerably more variegated than often presented by its more vociferous contemporary critics.

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