Part Two

Question 1

How can metabolic rate be measured?

Answer 1

1) oxygen consumption
2) c02 production
3) heat energy

Question 2

What is a single circulatory system?

Answer 2

In fish, Oxygen is absorbed through the fishes gills. . It is the least efficient. One atruim one ventricle

Question 3

What is the incomplete double circulatory system?

Answer 3

In amphibians and reptiles This is an incomplete double. They have 1 ventricle and 2 atria Amphibians gather oxygen through their moist skin whilst reptiles mix blood by a divided septum reducing the mixing of oxygenated and deoxygented blood

Question 4

What is a complete double circulatory system?

Answer 4

Mammals and birds have 2 ventricles and 2 atria which are separated by a septum but blood does not mix. This is the most efficient as no mixing is allowed here.

Question 5

What is a Confromer?

Answer 5

Organisms unable to alter their metabolic rate in a response to a change in the external environment…they have a low metabolic cost and a narrow range of ecological niches…an example of this is reptiles basking in the sun to allow the enzymes to function better

Question 6

What is a regulator?

Answer 6

An organism who’s metabolic rate can be regulated constantly regardless of its external environment..there is an increased range of ecological niches however they have higher metabolic costs