Question

Lizards also thermoregulate and, as in humans, thermoregulation in lizards involves negative feedback. lizards, however, are ectotherms and gain most of their heat from external sources. therefore, they often use behavioral mechanisms to adjust their body temperature. for example, if a lizard's body temperature drops below its normal range, the lizard may seek a sunny resting spot to warm up. what are the stimulus and the response in this example?

Answer 1

The stimulus include a reduction in internal body temperature and reduction in their metabolism.

The response is positioning their body to soak up maximum sunlight, by spreading themselves to create more surface area and warm up their core

Answer 2

The stimulus is a change, which can provoke the change in the body of the living organism. Generating a response to the stimulus is the characteristics of the living beings. The drop in the body temperature is a sort of stimulus response in the body of the organism, which generates a response for resting (slowing down metabolism) and trapping heat from the sunlight, in case of lizards.

The stimulus in this case is the drop down in body temperature and the response is slowing down the body activity and trapping of heat energy from sunlight.