Measurement of metabolic rate

Question 1

Metabolic rate -

Answer 1

Quantity of energy used by the body over a given time.

Question 2

Unit of metabolic rate

Answer 2

Kilojoules or kilocalories

Question 3

3 ways of measuring metabolic rate

Answer 3

O2 consumption per unit time
CO2 production per unit time
Energy (heat) production per unit time

Question 4

Equipment used to measure metabolic rate

Answer 4

Respirometer
Oxygen probes
Carbon dioxide probes
Calorimeters

Question 5

Respirometer -

Answer 5

Measures the oxygen uptake by an organism

Question 6

Calorimeter -

Answer 6

Measure the heat generated by an organism over a period of time, can then be used to calculate metabolic rate.

Question 7

Basal metabolic rate (BMR)

Answer 7

The metabolic rate when an organism is at rest.

Question 8

BMR compared to when the organism is active

Answer 8

It is low compared to when the body is active

Question 9

Comparative metabolic rate rule

Answer 9

The greater the mass of an organism the higher that organisms metabolic rate

Question 10

BMR per unit mass

Answer 10

Higher for smaller organisms

Question 11

Why is the BMR per unit mass higher for smaller organisms

Answer 11

Smaller animals needs a greater delivery of oxygen to tissues around the body