Higher Biology Unit 2. KA3: Metabolic Rate

What is metabolic rate?

• The amount of water an organism needs daily

• The speed at which an organism moves

• The quantity of energy consumed by an organism per unit of time

• The rate at which an organism digests food

What does BMR stand for?

• Bilateral Metabolic Rate

• Biological Metabolic Rate

• Basal Metabolic Rate

• Basic Metabolic Rate

Which of the following is NOT a method for measuring metabolic rate?

• Heat produced

• Volume of carbon dioxide produced

• Volume of oxygen consumed

• Amount of food consumed

What does a respirometer measure?

• Carbon dioxide levels

• Oxygen consumption

• Blood pressure

• Heat production

What is the purpose of potassium hydroxide in a respirometer setup?

• To increase oxygen levels

• To measure heat production

• To generate energy

• To absorb carbon dioxide

Which organisms have higher metabolic rates?

• Birds and mammals

• Reptiles and amphibians

• Fish

• Insects

What is the main purpose of the circulatory system in organisms with high metabolic rates?

• To deliver nutrients

• To regulate temperature

• To deliver oxygen efficiently

• To remove waste products

What type of circulatory system do birds and mammals have?

• Single circulatory system

• Incomplete double circulatory system

• Complete double circulatory system

• Incomplete single circulatory system

Why is the complete double circulatory system more efficient?

• Because it supports aquatic life

• Because it prevents the mixing of oxygenated and deoxygenated blood

• Because it requires less energy

• Because it allows for faster movement

What is the significance of the septum in the heart?

• It produces red blood cells

• It regulates blood pressure

• It separates the left and right sides of the heart

• It controls the temperature of the blood