Metabolic Rate 2.3

Question 1

What can be used to measure metabolic rate ?

Answer 1

Metabolic rate can be measured using:
 Respirometers
 Oxygen probes
 Carbon dioxide probes
 Calorimeters

Question 2

Why are the metabolic rates of birds and mammals higher
than reptiles and amphibians, which are higher than fish ?

Answer 2

Organisms with high metabolic rates require more efficient delivery of oxygen to
cells.

Question 3

What type of circulatory system do birds and mammals have?

Answer 3

Birds and mammals have a complete double circulatory
system consisting of two Atria and two Ventricles.

Question 4

What does a double circulatory system contain?

Answer 4

There is no mixing of oxygenated and deoxygenated
blood, which can be pumped at a higher pressure.
This enables more efficient oxygen delivery to cells and
higher metabolic rates to be maintained.

Question 5

What type of circulatory system do amphibians and reptiles contain?

Answer 5

Amphibians and most reptiles have an incomplete
double circulatory system consisting of two Atria and
one Ventricle.

Question 6

What type of circulatory system do fish have?

Answer 6

Fish have a single circulatory system consisting of one
Atrium and one Ventricle.