Which process determines thermal energy dissipation from harbor seal flippers during prolonged swimming in cold water?

💡 Explanation

During cold water swimming, countercurrent heat exchange in seal flippers moderates heat loss by transferring heat from arterial blood to venous blood returning to the core because it minimizes thermal gradient. Therefore exchange efficiency dominates dissipation, rather than alternative mechanisms which have lesser impact in this scenario.

• Which mechanism minimizes heat loss when a hibernating arctic squirrel begins to rewarm?
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