What happens during countercurrent exchange?
A) Steep concentration gradients are created.
B) There is a transfer of heat or solute from fluids flowing in opposite directions.
C) There is a transfer of heat or solute from fluids flowing in the same direction.
D) Plasma is removed from blood, leaving only the solid red blood cells.
E) Active transport moves solutes across a membrane via transport proteins.
Correct Answer:
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