level: Metabolic Rate
Questions and Answers List
level questions: Metabolic Rate
| Question | Answer |
|---|---|
| what is metabolic rate | the quantity of energy used by an organism per unit time |
| what can be measured in order to compare metabolic rate | oxygen consumption carbon dioxide heat production |
| what can metabolic rate be measured by using | respirometers oxygen probes carbon dioxide probes calorimeters |
| what kind of oxygen delivery system do organisms with high metabolic rates require | they require more efficient delivery of oxygen to cells |
| compare the metabolic rates of birds and mammals to reptiles, amphibians and fish | birds and mammals have higher metabolic rates than reptiles and amphibians, which in turn have higher metabolic rates than fish |
| what kind of circulatory system do birds and mammals have | a complete double circulatory system consisting of two atria and two ventricles |
| what kind of circulatory system do amphibians and most reptiles have | an incomplete double circulatory system consisting of two atria and one ventricle |
| what kind of circulatory system do fish have | single circulatory system consisting of one atrium and one ventricle |
| why do complete double circulatory systems enable more efficient oxygen delivery to cells | they enable higher metabolic rates to be maintained as there is no mixing of oxygenated and deoxygenated blood, and so the oxygenated blood can be pumped out at a higher pressure |
| what is meant by a double circulatory system | blood enters the heart twice for each circulation of the body |
| what is meant by a single circulatory system | blood enters the heart once for each circulation of the body |