mg- aerobic system

Question 1

aerobic system

Answer 1

involves glycolysis, krebs cycle, electron transport chain

Question 2

glycolysis

Answer 2

Takes place in the sarcoplasm

is the break down of glucose to pyruvic acid. Produces two ATP molecules

Question 3

krebs cycle

Answer 3

the two acetyl groups diffuse into the matrix of the mitochondria. Here, they combine with the oxaloactic acid forming citric acid. Hydrogen is removed from citric acid and re-arranged form of citric acid undergoes oxaditive carboxylation. carbon dioxide is breathed out and hydrogen is taken to the electron transport chain.

Question 4

Purpose of Krebs cycle

Answer 4

is to generate hydrogen to transfer to the electron transport chain where it can be ‘dealt to’ in a way that will control acidity and enable the aerobic system to keep synthesising ATP.

Question 5

Steps of Krebs cycle

Answer 5

1) Acetyl-coenzyme A enters the Krebs cycle.
2) Acetyl-Coenzyme A is broken down into carbon dioxide (a waste product which is expelled through breathing) and hydrogen.
3) 2 more ATP are synthesised during this process and made available to fuel further muscle contractions.
4) Hydrogen is transferred to the electron transport chain

Question 6

electron transport chain

Answer 6

produces 34 molecules of ATP for every molecule of glucose

The hydrogen ions are combined with oxygen to form water. hydrogen electrons provide the energy to resynthesize ATP