unit 2 KA3 - metabolic rate

Question 1

how can you measure oxygen consumption to compare metabolic rates?

Answer 1

respirometers or oxygen probes

Question 2

how can you measure carbon dioxide production to compare metabolic rates?

Answer 2

carbon dioxide probes

Question 3

how can you measure heat production to compare metabolic rates?

Answer 3

calorimeters

Question 4

do organisms with high metabolic rates require more efficient delivery of oxygen to cells?

Answer 4

yeh obvi

Question 5

what is the order of metabolic rate from highest to lowest for mammals, fish, birds, reptiles and amphibians?

Answer 5

birds, mammals, ampihibians, reptiles, fish

Question 6

describe the anatomy and physiology of heart chambers and circulatory systems in birds and mammals

Answer 6

they have a complete double circulatory system consisting of two atria and two ventricles. this means the blood flows through the heart twice during one cardiac cycle, due to the 2 atria, and the oxygenated and deoxygenated blood are not mixed due to the 2 ventricles, making it a complate double.

Question 7

describe the anatomy and physiology of heart chambers and circulatory systems in amphibians and most reptiles

Answer 7

an incomplete double circulatory system consisting of 2 atria and one ventricle. blood flows through heart twice in one cycle, hence the double, due to the 2 atria, although the oxygenated blood and the deoxygenated blood are mixed due to the 1 ventricle, hence the incomplete.

Question 8

describe the anatomy and physiology of heart chambers and circulatory systems in fish

Answer 8

single circulatory system consisting of one atrium and one ventricle.

Question 9

why are complete double circulatory systems the most efficient?

Answer 9

they enable higher metabolic rates to be maintained as there is no mixing of the oxygenated and deoxygenated blood and the oxygenated blood can be pumped out at a higher pressure. this enables more efficient oxygen delivery to cells