metabolic rate

• whact can be measured to compare the metabolic rates of organisms?

  oxygen consuption, carbom dioxide and heat production
• what can be used to measure metabolic rate


  respirometers, oxygen probes, carbon dioxide probes and calorimeters
• what do organisms with high metabolic rate require?

  efficent delivery of oxygen to cells
• reptiles and amphibians have a higher metabolic rate than what?

  fish
• what has a higher metabolic rate than reptiles and amphibians?

  birds and mammals
• describe the heart in birds and mammals


  double complete, two atria and two ventricles
• describe the heart in amphibians and reptiles


  double incomplete, two atria and one ventricle
• describe the heart in fish


  single system, one atria, one ventricle
• what do complete double systems enable?

  higher metabolic rates to be maintained
• what is an advantage of complete double systems?

  there is a full seperation between oxygenated and deoxygenated blood, which allows oxygenated blood to be pumped out at high preassure, which allows for efficent delivery of oxygen to cells