2.3 Metabolic Rate Flashcards
1
Q
What are 3 ways to measure metabolic rate?
A
- oxygen consumption-respirometer, oxygen probes(indirectly)
- carbondioxide production-CO2 probes(indirectly)
- heat production-calorimeter(directly)
2
Q
Order groups of organisms from highest metabolic rate to lowest
A
- birds and mammals
- reptiles and amphibians
- fish
3
Q
What do organisms with high metabolic rates require?
A
more efficient delivery of oxygen to cells
4
Q
What type of circulation system do birds and mammals have and describe it
A
- complete double circulatory system
- two atria and two ventricles
- blood passes through the heart twice during each complete circuit
- oxygenated and deoxygenated blood are kept completely separate
5
Q
describe the benefits of a double circulatory system
A
- enable higher metabolic rates to be maintained
- there is no mixing of oxygenated and deoxygenated blood
- oxygenated blood can be pumped out at high blood pressure, enabling more efficient oxygen delivery to cells
- blood that is delivered to the tissues is fully oxygenated as the oxygenated and deoxygenated blood are kept separate
6
Q
what circulatory system do amphibians and reptiles have and describe it
A
- incomplete double circulatory system
- two atria and one ventricle
- right atrium gets deoxygenated blood and left atrium gets oxygenated blood which allows blood pressure to be maintained
- oxygenated and deoxygenated blood mix before they get pumped out of the ventricle
- the blood delivered to the tissues is a mix of oxygenated and deoxygenated blood, making the system inefficient
7
Q
What circulatory system so fish have and describe it
A
- single circulatory system
- one atrium and one ventricle
- blood only passes through the heart once in each complete circuit
- blood is delivered under low blood pressure (inefficient)
8
Q
what is metabolic rate?
A
- the amount of energy used on a given period of time
- can be measured indirectly in terms of the oxygen consumed the carbon dioxide produced
- directly by the heat produced
