3.1.1.6 Energy Systems: aerobic system

Question 1

Adenosine triphosphate (ATP)

Answer 1

The only usable form of energy in the body

Question 2

When would the Aerobic energy system be used?

Answer 2

Exercise intensity is low and oxygen supply eg. Jogging, the aerobic system is the preferred energy pathway

Question 3

How does the aerobic system provide energy? Stage 1

Answer 3

Has 3 stages:

1. Glycolysis- first stage is a anaerobic so takes place in the sarcoplasm of the muscle cell. For every molecule of glucose undergoing glycolysis, two molecules of ATP are formed.
   - then oxidized into two acetyl groups and is then carried into Krebs cycle by coenzyme A
   - (check diagram in workbook)

Question 4

How does the aerobic system provide energy? Stage 2

Answer 4

2. Krebs cycle- the two acetyl groups diffuse into the matrix of mitochondria
   - (check diagram in workbook)

Question 5

How does the aerobic system provide energy? Stage 3

Answer 5

3. Electron transport chain- hydrogen is carried to the electron transport chain by hydrogen carries.
   - (check diagram in workbook)

Question 6

Memory tool for the 3 stages of the aerobic system

Answer 6

GKE (Get Kinetic Energy)
G: glycolysis
K: Krebs cycle
E: electron transport chain

Question 7

Glycolysis definition

Answer 7

A process in which glucose is converted to pyruvate to produce energy

Question 8

Sarcoplasm definition

Answer 8

The fluid that surrounds the nucleus of a muscle fibre and is the site where anaerobic respiration takes place

Question 9

Krebs cycle def

Answer 9

A series of cyclical chemical reactions that take place using oxygen in the matrix of the mitochondrion.

Question 10

Electron transport chain

Answer 10

Involves a series of chemical reactions in the cristae of the mitochondria where hydrogen is oxidized to water and 34 ATP are produced

Question 11

Beta oxidation

Answer 11

Fatty acids are converted into acetyl coenzyme A, which is the entry molecule for the Krebs cycle