UNIT 2.3

Question 1

BMR

Answer 1

basal metabolic rate = energy required by an organism at rest

Question 1

metabolic rates can be compared by measuring

Answer 1

• oxygen consumption per unit of time
• co2 production per unit of time
• energy production (as hear) per unit of time

Question 2

respirometers

Answer 2

• measures respiration by measuring the volume of oxygen uptake or CO2 production - known as indirect calorimetry

Question 3

calorimeters

Answer 3

measure the heat generated by an organism and calculates the metabolic rate from the result

Question 4

circulatory systems
single

Answer 4

• 1A 1V
• blood flows through heart once
• lower velocity due to friction at capillaries

Question 5

circulatory stystems
double incomplete

Answer 5

• 2A 1V
• more active organisms
• require higher velocity of blood flow = as energy is required at a much faster rate

Question 6

circulatory systems
double complete

Answer 6

• 2A 2V
• higher velocity
• blood flows through twice