Metabolism

Question 1

Metabolism

Answer 1

• Metabolism is the total amount of energy an animal requires
• Some of the energy is simply the energy required to fuel life

Question 2

Define

Anabolism

&

Catabolism

Answer 2

Anabolism -Requires energy (building reactions)

Catabolism -Release energy (breaking reactions)

Question 3

Energy Budget =

Answer 3

Energy Input (Mostly chemical, ingested)

substract

Energy Output (Mostly heat)

equals

Energy budget

Question 4

Energy input

Question 5

Familiarise yourself with this

Question 6

• Anaerobic metabolism cannot be maintained for a very long time.
• Aerobic metabolism is fueled by fat, virtually no limit to how much you can store.

Question 7

Define ‘Basal Metabolic Rate’

Answer 7

• Minimal stabble rate of energy metabolism
• May be measured as net output (e.g. heat) or net input (e.g. O2 consumption)

Question 8

Metabolic Rate is affected by:

Answer 8

• Body temperature
• Environmental temperatures
• Exercise, stress
• growth
• lactation
• total body mass and fat-free body mass

Question 9

The biggest component that affects metabolism is..

(Basal metabolic rate)

Answer 9

Mass!

Question 10

Familiarise

Question 11

Basalmetabolic rate

Active metabbolic rate

Answer 11

The difference is the ‘aerobic scope’ and aerobbic capacity for work

The larger the difference between those two values, the more energy you have potentially available

Question 12

The Aerobic work increases as the excercise increases.

Graph showing oxygen utilisation in different stages of resting/intensity.

Answer 12

The graph shows the increasing rate of O2 utilisation as exercise intensity increases.

VO2max is generally about 10-12 times the rate of O2 use at rest in humans.

Higher VO2 max allows greater and more sustained aerobbic exercise.

Question 13

The more oxygen you can get into the body the more aerobic oxygen you can sustain, the bigger that difference between your VO2 max value and Basal metabolic rate (more scope for aroebic work)

Lance Armstrong - 85ml per min

Race hourses - 180ml per min

Sled dogs - 240ml O2 per min

Question 14

Calculate the Q10 values for the data above from 5oc to 35oC for standard metabolic rate (i.e. inactive goldfish)

Metabolic rate at higher temp / Metabolic rate at the lower temp

Between 15oc & 25oc = 140/50

Between 25oC & 35oC = 225/40

Question 15

Animals with faster BMR’s generally live shorter lives than others

(Rate of living Hypothesis)