Higher Biology U2 KA3 Metabolic Rate

Which of the following would be the least suitable to measure metabolic rate?

• Oxygen consumption

• Carbon dioxide uptake

• Heat production

• Glucose uptake

Which of the following pairs of organisms has the highest metabolic rates?

• Fish and Reptiles

• Mammals and Birds

• Reptiles and Amphibians

• Birds and Reptiles

Which of the following is the best description of the circulatory system of birds and mammals?

• Single circulatory system with a heart with one ventricle and one atrium

• Incomplete double circulatory system with a heart with one ventricle and two atria

• Complete double circulatory system with a heart with two atria and two ventricles

• Incomplete double circulatory system with a heart with two ventricles and two atria

Which of the following is the best description of the circulatory system of amphibians and reptiles?

• Single circulatory system with a heart with one ventricle and one atrium

• Incomplete double circulatory system with a heart with one ventricle and two atria

• Complete double circulatory system with a heart with two atria and two ventricles

• Incomplete double circulatory system with a heart with two ventricles and two atria

Which of the following is the best description of the circulatory system of fish?

• Single circulatory system with a heart with one ventricle and one atrium

• Incomplete double circulatory system with a heart with one ventricle and two atria

• Complete double circulatory system with a heart with two atria and two ventricles

• Incomplete double circulatory system with a heart with two ventricles and two atria

Which of the following statements about metabolism is true?

• Organisms with higher metabolic rates require the most efficient delivery of oxygen to cells.

• Organisms with higher metabolic rates require the most efficient delivery of carbon dioxide to cells.

• Organisms with lower metabolic rates require the most efficient delivery of oxygen to cells.

• Organisms with lower metabolic rates require the most efficient delivery of carbon dioxide to cells.

Why is a single circulatory system less efficient at oxygen delivery than a double circulatory system?

• Blood is delivered to cells under low pressure

• Blood is delivered to cells under high pressure

• There is no mixing of oxygenated and deoxygenated blood

Why is the circulatory system of an amphibian less efficient than of a bird?

• Blood is delivered to cells under low pressure

• Blood is delivered to cells under high pressure

• There is no mixing of oxygenated and deoxygenated blood

• There is mixing of oxygenated and deoxygenated blood

If a 5g snail has an oxygen uptake of 0.2 litres per gram per minute - how many litres of oxygen would be used over 30 minutes?

• 30 grams

• 6 grams

• 1 gram

• 150g

What would happen to the metabolic rate of an organism in a respirometer if the temperature was reduced from 25 degrees Celsius to 15 degrees Celsius

• It would increase

• It would decrease

• It would stay the same