Are reptiles endotherms or ectotherms?
They are ectotherms.
Endothermic = warm-blooded Ectothermic = cold-blooded Endotherms are able to maintain their own body temperature, whereas Ectotherms rely on their environment to regulate body temperature. Ectotherms are animals like reptiles, fish, etc. Reptiles lay out in the sun in order to keep themselves warm and to aid in digestion. Humans are endotherms.
Ectotherms, such as reptiles, rely on their external environment for temperature. Their body temperatures fluctuate with changing conditions. They do however have mechanisms to change their temperature, such as sitting in the sun or reducing physical activity. The older term for ectotherms is 'cold blooded' - however, this is not commonly used anymore because often ectotherms can have body temperatures much higher than endotherms. Endotherms, such as humans, have internal control mechanisms for body temperature…
Ectotherms, such as lizards and all reptiles, have to regulate their body temperature and maintain homeostasis by warming themselves externally. If you have ever seen a lizard or a snake tanning itself in bright sunlight, you have seen this process. Ectotherms have to do this to survive because their bodies' metabolism cannot generate enough internal heat (unlike endotherms). This makes it impossible for reptiles to live in cold weather climates, such as the arctic.
I am assuming you mean Ectotherm? Ectotherms are animals that rely on the environmental temperature for their metabolism VS Endotherms that produce their own body heat. Ectotherms become more active in warmer temperatures and sluggish in cooler ones. The exact temperature that affects metabolism is different for different species, so this answer is in general terms. Yes, Ectotherms become more active at higher temperatures. But like Endotherms can be killed by temperature extremes. Some examples…
No. Being a mammal, the echidna is an endotherm, or what used to be commonly called "warm-blooded". Endotherms regulate their body temperature via their own metabolism. Ectotherms used to be known as "cold-blooded". Ectotherms rely on the external environment to control their body temperature, and include reptiles and fish.
No. Being a mammal, the platypus is an endotherm, or what used to be commonly called "warm-blooded". Endotherms regulate their body temperature via their own metabolism. Ectotherms used to be known as "cold-blooded". Ectotherms rely on the external environment to control their body temperature, and include reptiles and fish.