Glycolytic system

Question 1

When does the glycolytic system kick in

Answer 1

The glycolytic system kicks in during high intensity activity after the first ten seconds of intense activity exhausts PC stores and ATP levels fall

Question 2

What is the process of the glycolytic system

Answer 2

1) ATP and P levels rise again and trigger the release of phosphofructokinase(PFK) an enzyme which catalyses the breakdown of the next available fuel(glucose)
2) If glucose levels dip,glycogen phosphorylase(GPP) an enzyme that catalyses the breakdown of stored glycogen is released converting glycogen into glucose
3) The breakdown of glucose in the absence of oxygen is through a process called anaerobic glycolysis and results in the production of pyruvic acid
4) Lactate dehydrogenase(LDH) is released which is an enzyme which catalyses the conversion of pyruvic acid into lactic acid,which accumulates and slows ATP resynthesis

Question 3

What is the type of reaction

Answer 3

Anaerobic

Question 4

What is the site of reaction

Answer 4

Sarcoplasm

Question 5

What is the food fuel used

Answer 5

Glycogen/glucose

Question 6

What are the controlling enzymes

Answer 6

GPP,PFK and LDH

Question 7

What is the ATP yield

Answer 7

1 mole of glycogen yields 2 moles of ATP (1:2)

Question 8

What is the by product

Answer 8

Lactic acid

Question 9

What is the intensity of activity

Answer 9

High intensity

Question 10

What is the duration of the system

Answer 10

Up to three minutes depending on intensity

Question 11

What are the strengths

Answer 11

• No delay for oxygen and large fuel stores in the liver,muscles and blood stream
• Relatively fast fuel breakdown for ATP resynthesis
• Provides energy for high intensity activities for up to three minutes
• Lactic acid can be recycled into fuel for further energy production