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41.7 Ectotherms and Endotherms The body temperatures of a lizard and a mouse of the same body size respond differently to changes in environmental temperature.

perature or metabolism independently of the environmental temperature. The mouse, however, regulates its body temperature by increasing its metabolic rate, which increases its production of body heat. (You may wonder why the mouse curve in Figure 41.7b changes shape at higher environmental temperatures. We will come back to that question in the following section.)

At colder ambient temperatures, metabolic heat production increases in endotherms.

Notice the difference in the two scales. At all temperatures, the metabolism of the lizard is much less than that of the mouse.

At colder ambient temperatures, metabolic heat production increases in endotherms.

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Your Metabolism - What You Need To Know

Your Metabolism - What You Need To Know

If you have heard about metabolism, chances are it is in relation to weight loss. Metabolism is bigger than weight loss, though, as you will learn later on. It is about a healthier, better you. If you want to fire up your metabolism and do not have any idea how to do it, you have come to the right place. If you have tried to speed up your metabolism before but do not see visible results, you have also come to the right place.

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