Energy systems - aerobic energy system

Question 1

Advantages of the aerobic system?

Answer 1

1 - 36 ATP molecules can be produced.
2 - No fatiguing by-products.
3 - Lots of glycogen stores so exercise can last for a long time.

Question 2

Disadvantages of the aerobic system?

Answer 2

1 - Cannot be used straight away.
2 - Takes a while for enough o2 to be available to meet the demands of the activity and unsure all fatty acids and glycogen has been broken down.Fatty acid transportation is low and also requires 15% more oxygen to be broken down than glycogen.

Question 3

What is the first stage of the aerobic energy system?

Answer 3

Glycolysis

Question 4

What is Glycolysis?

Answer 4

The breakdown of glucose into pyruvic acid. Pyruvic acid is oxidised.
2 ATP molecules.

Question 5

What is the second stage of the aerobic energy system?

Answer 5

The Krebs cycle

Question 6

What is the Krebs cycle?

Answer 6

1 - Two acetyl groups breakdown into the mitochondria.
2 - Citric acid is then formed.
3 - Hydrogen is then removed from the citric acid and then undergoes oxidative carboxylation.
4 - Carbon forms CO2 which is then transported to the lungs and breathed out, hydrogen is taken to the electron transport chain.
5 - Results in 2 ATP molecules.

Question 7

What is the third stage of the aerobic energy system?

Answer 7

Electron Transport chain.

Question 8

What occurs in the Electron Transport Chain?

Answer 8

1 - Hydrogen is carried to the Cristae of the mitochondria where hydrogen splits into hydrogen ions and charged with potential energy.
2 - Hydrogen ions are oxidised to form water while the hydrogen electrons provide energy to re-synthesis ATP
3 - The rest of the ATP molecules are made here.

Question 9

Where is hydrogen carried to in the electron transport chain?

Answer 9

Cristae

Question 10

What is the name of the groups in the Krebs cycle?

Answer 10

Acetyl