Energy Systems

Question 1

What are energy systems?

Answer 1

Bioenergetic systems are metabolic processes that relate to the flow of energy in living organisms.
- Convert energy into Adenosine Triphosphate (ATP)
- Photosynthesis in plants
- Cellular respiration in animals/mammals
All biological organisms must synthesise ATP for utilisation of cells.
In animals ATP is synthesised in the mitochondria

Question 2

What is the system that converts ADP back to ATP

Answer 2

The Krebs cycle

Question 3

What fuel is used in ATP-PCr and what type of activity is powered? What is its by-product and how many ATP are produced?
(in muscle)

Answer 3

Creatine Phospate is the fuel used. It is very high-intensity ,short duration(6-10secs) without the use of 02 & active at the onset of all activity.
Its by-product is Creatine and produces 1 ATP.

Question 4

What fuel is used in Anaerobic Glycolysis and what type of activity is powered? What is its by-product and how many ATP are produced?
(Lactic Acid)

Answer 4

Glycogen is the fuel used. it is high intensity short to moderate duration(10-90secs) without the use of 02.
Its product is Lactic Acid and produces 2 ATP

Question 5

What fuel is used in Oxidative Phosphorylation and what type of activity is powered? What is its by-product and how many ATP are produced?
(Aerobic Glycolysis)

Answer 5

Carbohydrates,Fats
Protein ( Extreme circumstances) are the fuel used. Low to moderate intensity ,long duration (>90secs) By-products CO2 and H20
Produces Carbs; 36-39
Fats. >100. ATP

Question 6

Which energy system is most efficient?

Answer 6

Oxidative Phosphorylation (Aerobic Glycolysis)