THE AEROBIC SYSTEM

Question 1

How is the aerobic system powered?

Answer 1

The aerobic system is powered by glycogen or fatty acids (stored as triglycerides).

Question 2

What are the 3 stages of the aerobic system, how much ATP do they produce and where do they take place?

Answer 2

The 3 stages of the aerobic system are:
Stage 1- Glycolysis, 2 ATP produced, sarcoplasm.
Stage 2- Krebs cycle, 2 ATP produced, matrix of the mitochondria.
Stage 3- Electron transport train, 34 ATP produced, christae of the mitochondria.

Question 3

What are the controlling enzymes involved in the aerobic system?

Answer 3

The controlling enzymes involved in the aerobic system are GPP, PFK and LDH.

Question 4

What is the intensity of the aerobic system?

Answer 4

The intensity of the aerobic system is medium/low.

Question 5

How much ATP is produced from the aerobic system?

Answer 5

Every 1 molecule of glucose= 38 molecules of ATP so the ratio 1:38.

Question 6

What is the duration of the aerobic system?

Answer 6

The duration of the aerobic system is over 3 minutes.

Question 7

What are the advantages and disadvantages of the aerobic system?

Answer 7

Advantages

1. Gives of a tremendous energy yield.
2. Can utilise fats, which store more energy than carbohydrates.
3. The by-products are easily dealt with.

Disadvantages

1. The process is complicated.
2. It places considerable demands on the body’s ability to deliver oxygen to the active muscles.

Question 8

What happens during the aerobic process?

Answer 8

1. Glycolysis
   - Glycogen, glucose and pyruvic acid is broken down by controlling enzymes to produce 2 ATP and acetyl coenzyme A.
2. Krebs cycle
   - Acetyl coenzyme A is then utilized within the Krebs cycle to produce several major products such as oxaloacetic acid and citric acid which drive the formation of 2 ATP as well as CO2 but this is exhaled.
3. Electron transport train
   - Hydrogen from the Krebs cycle is then used in the electron transport train to produce water and 34 ATP.