In a comparison of ectotherms and endotherms, which of the following.pdf
- 1. In a comparison of ectotherms and endotherms, which of the following are correct? 1. Endotherms are regulators while ectotherms are conformers 2. Endotherms have higher energetic demands compared to ectotherms. 3. Endotherms spend more energy on internal temperature regulation compared to ectotherms. 4. Endothermy is more common among animal phyla than ectothermy. 5. At the cellular level, endotherms cells always produce more ATP and more heat. Solution 1.correct Regulator A regulator is also known as an endotherm. A regulator uses internal control mechanisms to maintain the optimum temperature needed for its body to function. Mammals and birds are examples of regulators. They are often described as warm blooded because they maintain a constant body temperature. For example, if the climate around a regulator gets hotter, the animal can adjust its metabolism to lessen the need for heat production. Conformer (or ectotherm) A conformer is also called an ectotherm. A conformer cannot regulate its own internal temperature so it must adapt its behavior, physically moving itself to environments with optimum temperatures. Reptiles, amphibians and insects are all conformers and are often referred to as cold blooded. For example, a lizard may lie on a rock in the sun to raise its body temperature, as it cannot regulate it internally. 2.not correct Endotherms also called warm blooded animals have the ability to regulate their body temperature by themselves. If the endotherms are in a cold place their body increases the metabolism and generates more heat. This will compensate for the cold outside. In a hot region the body metabolism is tuned down (this is not as efficient as the adaptation to cold region - as the metabolism can't be turned down below a certain limit - this will result in death) a little and heat generation is somewhat reduced. The second and more efficient mechanism is the heat dissipation by sweating and through skin (directly). Ectotherms on the other hand, do not have efficient temperature regulation systems. In warm regions when the temperature is high, the ectotherms seek shade and low-temperature areas to prevent over-heating In cool regions they seek sunlight and expose themselves to the sunlight for warmth. For the
- 2. same reason, they can also search out and stay near fire pits, campfires etc... So when we calculate the energy demands, the ectotherms need more energy as they regulate their own metabolisms to match the need. 3.correct previously explaine 4.not correct,ectother ectothermy is more common then endothermy 5.correct