H Biology - Unit 2 - KA3 - Metabolic Rate

What is metabolic rate?

Metabolic rate is the quantity of energy consumed by an organism per unit of time

What can metabolic rate be measured as?

Metabolic rate can be measures as;

• The volume of oxygen consumed per unit of time

• The volume of carbon dioxide produced per unit of time

• The heat produced, usually as a temperature increase, per unit of time

What words must you use when talking about metabolic rate?

You must say “per unit of time” when talking about metabolic rate

How can metabolic rate be measured?

Metabolic rate can be measured using;

• Respirometers

• Carbon dioxide probe

• Oxygen probe

• Calorimeter

What do carbon dioxide probes and oxygen probes measure?

Carbon dioxide probes and oxygen probes measure the concentration of carbon dioxide or oxygen

How do different groups of organism’s metabolic rates compare?

Birds and mammals have a higher metabolic rate than reptiles and amphibians, which in turn have a higher metabolic rate than fish

What do organisms with high metabolic rates require?

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

What circulatory system do birds and mammals have?

Birds and mammals have a complete double circulatory system

What is a complete double circulatory system composed of?

A complete double circulatory system is composed of two atria and two ventricles

What is there none of in complete double circulatory systems?

In complete double circulatory systems there is no mixing of oxygenated blood and deoxygenated blood

What can be done to blood in a complete double circulatory system?

In a complete double circulatory system blood can be pumped at a higher pressure

What does blood being pumped at a higher pressure in a complete double circulatory system enable?

Blood being pumped at a higher pressure in a complete double circulatory system enables more efficient delivery of oxygen to cells

What circulatory system do amphibians and most reptiles have?

Amphibians and most reptiles have an incomplete double circulatory system

What is an incomplete double circulatory system composed of?

An incomplete double circulatory system consists of two atria and one ventricle

What circulatory system do fish have?

Fish have a single circulatory system

What is a single circulatory system composed of?

A single circulatory system is composed of one atria and one ventricle

How are the different types of circulatory system ranked by metabolic rate and oxygen delivery efficiency from most efficient to least efficient?

Complete double circulatory system > Incomplete double circulatory system > Single circulatory system

How many types of circulatory systems are there?

There are three types of circulatory systems

What are the three circulatory systems?

The three circulatory systems are;

• Double complete circulatory system

• Double incomplete circulatory system

• Single circulatory system

Which circulatory system is this?

That is a complete double circulatory system

What type or circulatory system is this?

That is a incomplete double circulatory system

What type of circulatory system is this?

That is a single circulatory system