Question

a fox is a type of mammal that is related to dogs. how does a fox most likely respond to hot air temperatures in a way that ectothermic animals cannot?
○ by panting, which is in response to an internal stimulus
○ by panting, which is in response to an external stimulus
○ by moving into the shade, which is in response to an internal stimulus
○ by moving into the shade, which is in response to an external stimulus

Explanation:

• Internal vs. External Stimulus:
• An external stimulus comes from the environment outside the body (e.g., hot air temperature). An internal stimulus comes from within the body (e.g., hunger).
• Moving into the shade is a behavior that both endothermic (like foxes) and some ectothermic animals (e.g., lizards) can do in response to an external stimulus (heat).
• Panting is a physiological response. Foxes (as endotherms) pant to regulate their internal body temperature. Ectotherms rely mainly on external environmental factors to regulate their body temperature and do not have this internal - physiological response (panting) to regulate body temperature in the same way.
• Since the hot air temperature is an external stimulus, and panting is a response that endotherms (like foxes) use to regulate body temperature (an internal process in response to an external cue), while ectotherms cannot use panting for internal temperature regulation.

Answer:

by panting, which is in response to an external stimulus