What would be the consequences if we were to reverse the direction of water flow over the gills of a fish, moving water inward past the operculum, past the gills, then out of the mouth? This reversal of water flow would ________.
A) reduce the efficiency of gas exchange
B) change the exchange of gases in the body from carbon dioxide out and oxygen in to carbon dioxide in and oxygen out
C) increase the efficiency of gas exchange

Question

Quizplus · Accepted Answer

The current direction of water flow over the gills of a fish allows for efficient gas exchange. If we were to reverse the direction of the water flow, it would reduce the efficiency of gas exchange as the water would not be as well oxygenated when it passes over the gills. This could lead to respiratory issues for the fish.

What Would Be the Consequences If We Were to Reverse