Countercurrent Heat Exchange in "Hot" Fish

Multiple Choice

Countercurrent heat exchange in "hot" fish

A) involves the transfer of heat from warm blood coming from the muscles to cold blood flowing into the muscles.
B) allows "hot" fish to maintain cooler body temperatures in warm water.
C) is found in mostly small, rapidly swimming fish.
D) maintains a fish's sustainable power output over a 10°C rise in water temperature.
E) ensures that blood warmed in the gills flows directly to the heart.