托福口语 Task 3

In biology, the concept of 'behavioral thermoregulation' refers to the deliberate actions taken by animals to regulate their body temperature by seeking out or avoiding specific environmental conditions. Unlike physiological mechanisms such as sweating or shivering, behavioral thermoregulation involves conscious choices, such as moving to a warmer or cooler location, changing posture, or altering activity patterns. This strategy is crucial for survival, as maintaining an optimal body temperature allows animals to perform essential functions like hunting, escaping predators, and reproducing efficiently.

Professor: Let me give you an example from a desert lizard species. During the early morning, the desert is quite cool, so the lizard basks on sun-warmed rocks. It flattens its body to maximize heat absorption, raising its temperature quickly. As the day progresses and the sand becomes scorching hot, the lizard faces a risk of overheating. To cool down, it lifts its body off the ground, using its legs to create a gap between its belly and the hot surface, allowing air to circulate. It also moves into the shade of rocks or burrows into the sand, which is cooler underground. By doing this, the lizard actively manages its body temperature, staying active during the day while avoiding lethal heat.