Metabolic Rate

Question 1

define metabolic rate

Answer 1

the amount of energy used by an organism in a given period of time

Question 2

how can metabolic rate be measured?

Answer 2

oxygen consumption, CO2 production can be measured using a respirometer (indirect calorimetry), heat production can be measured using a calorimeter (direct calorimetry)

Question 3

Why do different organisms have different metabolic rate

Answer 3

Different metabolic needs

Question 4

Describe the link between metabolic rate an oxygen consumption

Answer 4

Organisms with high metabolic rate more efficient delivery of oxygen to cells

Question 5

Describe the heart arrangement and circulation type for fish

Answer 5

2 chambers, single circulatory system

Question 6

Describe the heart arrangement and circulation type for amphibians and reptiles

Answer 6

Three chambers- L/R atrium and 1 ventricle, incomplete double

Question 7

Describe the heart arrangement and circulation type for mammals + birds

Answer 7

4 chambers, double complete

Question 8

Comment on the efficiency of the circulatory system in fish

Answer 8

The single circulatory system is the least effective as pressure is lost

Question 9

Comment on the efficiency of the circulatory system in amphibians and reptiles

Answer 9

The double incomplete circulatory system is more effective as pressure is maintained, but tissue blood is incompletely oxygenated (oxygenated and deoxygenated blood are mixed)

Question 10

Comment on the efficiency of the circulatory system in birds and mammals

Answer 10

The double complete circulatory system is the most effective as pressure is maintained (blood can reach all parts) and the tissue blood is completely oxygenated